tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

tree-wide: make macros for converting fds to pointers and back generic and use them everywhere

util-lib: split out allocation calls into alloc-util.[ch]

util-lib: split out fd-related operations into fd-util.[ch] There are more than enough to deserve their own .c file, hence move them over.

util-lib: split our string related calls from util.[ch] into its own file string-util.[ch] There are more than enough calls doing string manipulations to deserve its own files, hence do something about it. This patch also sorts the #include blocks of all files that needed to be updated, according to the sorting suggestions from CODING_STYLE. Since pretty much every file needs our string manipulation functions this effectively means that most files have sorted #include blocks now. Also touches a few unrelated include files.

util: rework strappenda(), and rename it strjoina() After all it is now much more like strjoin() than strappend(). At the same time, add support for NULL sentinels, even if they are normally not necessary.

util: replace RUN_WITH_LOCALE with extended locale functions There were two callers, one can use strtod_l() and the other strptime_l(). (David: fix up commit-msg and coding-style)

import: fix mem-leak in CurlGlue Make sure to actually free the underlying object in CurlGlue unref.

import: prefer usec_t over time_t

import: add a new "pull-gpt" verb for downloading GPT disk images from the internet

import: add new minimal tool "systemd-import" for pulling down foreign containers and install them locally This adds a simply but powerful tool for downloading container images from the most popular container solution used today. Use it like this: # systemd-import pull-dck mattdm/fedora # systemd-nspawn -M fedora This will donwload the layers for "mattdm/fedora", and make them available locally as /var/lib/container/fedora. The tool is pretty complete, as long as it's only about pulling down images, or updating them. Pushing or searching is not supported yet.