doc: correct orthography, word forms and missing/extraneous words

doc: correct punctuation and improve typography in documentation

man: update sysctl example about netfilter It turns out that since kernel 3.18 netfilter on bridged packets is off anyway, so the example should be reworded (and the module name updated).

man: revert dynamic paths for split-usr setups This did not really work out as we had hoped. Trying to do this upstream introduced several problems that probably makes it better suited as a downstream patch after all. At any rate, it is not releaseable in the current state, so we at least need to revert this before the release. * by adjusting the path to binaries, but not do the same thing to the search path we end up with inconsistent man-pages. Adjusting the search path too would be quite messy, and it is not at all obvious that this is worth the effort, but at any rate it would have to be done before we could ship this. * this means that distributed man-pages does not make sense as they depend on config options, and for better or worse we are still distributing man pages, so that is something that definitely needs sorting out before we could ship with this patch. * we have long held that split-usr is only minimally supported in order to boot, and something we hope will eventually go away. So before we start adding even more magic/effort in order to make this work nicely, we should probably question if it makes sense at all.

man: generate configured paths in manpages In particular, use /lib/systemd instead of /usr/lib/systemd in distributions like Debian which still have not adopted a /usr merge setup. Use XML entities from man/custom-entities.ent to replace configured paths while doing XSLT processing of the original XML files. There was precedent of some files (such as systemd.generator.xml) which were already using this approach. This addresses most of the (manual) fixes from this patch: http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/tree/debian/patches/Fix-paths-in-man-pages.patch?h=experimental-220 The idea of using generic XML entities was presented here: http://lists.freedesktop.org/archives/systemd-devel/2015-May/032240.html This patch solves almost all the issues, with the exception of: - Path to /bin/mount and /bin/umount. - Generic statements about preference of /lib over /etc. These will be handled separately by follow up patches. Tested: - With default configure settings, ran "make install" to two separate directories and compared the output to confirm they matched exactly. - Used a set of configure flags including $CONFFLAGS from Debian: http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/tree/debian/rules Installed the tree and confirmed the paths use /lib/systemd instead of /usr/lib/systemd and that no other unexpected differences exist. - Confirmed that `make distcheck` still passes.

man: fix a bunch of links All hail linkchecker!

Reindent man pages to 2ch

man: Factor out a common snippet for .d directories and precedence Several manpages contain duplicate text describing a standard set of .d configuration directories, with the usual sorting, precedence, overrides, and so on. Factor this common text out using XInclude before proliferating it even further.

man: add emacs header to get correct indention in nxml-mode for the manpage XML files that use 2ch indenting In the long run we really should figure out if we want to stick with 8ch or 2ch indenting, and not continue with half-and-half. For now, just make emacs aware of the files that use 2ch indenting.

man: add missing commas

/proc/sys prefixes are not necessary for sysctl anymore

man: fix file extension in udev rules example https://bugzilla.redhat.com/show_bug.cgi?id=634736

doc: typographical improvements and choice of words

man: also describe an udev rule for bridge sysctl

man: document statically loading modules for sysctl settings https://bugzilla.redhat.com/show_bug.cgi?id=1022977 https://bugzilla.novell.com/show_bug.cgi?id=725412

sysctl: replaces some slashes with dots It turns out that plain sysctl understands a.b/c syntax to write to /proc/sys/a/b.c. Support this for compatibility. https://bugs.freedesktop.org/show_bug.cgi?id=77466

man: document that per-interface sysctl variables are applied as network interfaces show up https://bugzilla.redhat.com/show_bug.cgi?id=1062955

man: resolve word omissions This is a recurring submission and includes corrections to: word omissions and word class choice.

man: wording and grammar updates This is a recurring submission and includes corrections to various issue spotted. I guess I can just skip over reporting ubiquitous comma placement fixes… Highligts in this particular commit: - the "unsigned" type qualifier is completed to form a full type "unsigned int" - alphabetic -> lexicographic (that way we automatically define how numbers get sorted)

man: fix description of file order application

man: fix description of sysctl.d order systemd-sysctl gives priority to the latest occurence as of commit 04bf3c1a60d82791e0320381e9268f727708f776, but the manpage hasn't been updated for that.

man: improve grammar and word formatting in numerous man pages Use proper grammar, word usage, adjective hyphenation, commas, capitalization, spelling, etc. To improve readability, some run-on sentences or sentence fragments were revised. [zj: remove the space from 'file name', 'host name', and 'time zone'.]

man: use <replaceable> in various places

binfmt,tmpfiles,modules-load,sysctl: rework the various early-boot services that work on .d/ directories This unifies much of the logic behind them: - All four will now ofllow the rule that the earlier file and earlier assignment in the .d/ directories wins. Before, sysctl was the only outlier, where the later setting always won. - All four now support getopt() and --help on the command line. - All four can now handle specification of configuration file names on the command line to apply. The tools will automatically find them, and apply them. Previously only tmpfiles could do that. This is useful for %post scripts in RPMs and suchlike. - This fixes various error path issues in conf_files_list()

man: fix sysctl.d(5) man page copy/paste mistake https://bugs.freedesktop.org/show_bug.cgi?id=52254

man: replace tabs with spaces

man: systemd-tmpfiles - document proper config-file-stack order

man: add documentation for the binfmt, modules-load, sysctl services

relicense to LGPLv2.1 (with exceptions) We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.

man: updates to sysctl.d(5)

conf: when looking for configurations look in /etc first, in /run second After long consideration we came to the conclusion that user configuration in /etc should always override the (generally computer generated) configuration in /run. User configuration should always be what matters over anything else. Hence rearrange the search orders accordingly. In general this should change very little as overriding like this is seldomn done so far, and the order between /etc and /usr stays the same.

tmpfiles.d: switch to stacked config dirs in /lib, /etc, /run

sysctl.d, binfmt.d, modules-load.d: switch to stacked config dirs in /lib, /etc, /run

man: document /etc/sysctl.d/