login-common: Do not link lib-ssl-iostream.la twice It's already in libdovecot.la

login-common: Remove ssl-proxy code

*-login: Added login_plugins and login_plugin_dir settings.

imap/pop3-login: Use libsasl for authenticating to remote IMAP/POP3 server. Also passdb lookup can return "proxy_mech" extra field to specify which SASL mechanism to use.

lib-ssl-iostream now dynamically loads openssl library instead of linking to it. This allowed removing the separate libdovecot-ssl library. In future if GnuTLS/NSS support is added it would also allow switching between them dynamically.

Added director_username_hash setting to specify what part of the username is hashed. The default is "%u" meaning the full username. Another potentially useful value is "%d" for hashing only the domain (i.e. redirect users from the same domain always to same server so they can safely access each others' shared mailboxes).

Makefile: Link with SSL_LIBS whenever linking libssl_iostream.la

login proxy: Removed host DNS lookup code, since auth does it now.

login proxy: Verify that remote hostname matches SSL cert, unless ssl=any-cert

Makefile: Fixes to compiling with LDFLAGS="-Wl,--as-needed -Wl,--no-undefined"

configure: Removed --enable-header-install. It's now always enabled. There didn't seem to be much point in keeping it optional anymore. They're now more useful than before because shared libraries are also installed. --HG-- branch : HEAD

Added support for tcpwrappers and potentially other login access checks. --HG-- branch : HEAD

login: Proxying supports now doing DNS lookups for host names. --HG-- branch : HEAD

login-common: Install headers. --HG-- branch : HEAD

login-common: Renamed common.h to login-common.h --HG-- branch : HEAD

login-proxy: If proxy destination is known to be down, fail immediately. We'll use simple rules: 1. If connection to destination server failed more recently than it succeeded AND there is currently at least one client trying to connect to it, fail immediately without even trying to connect. 2. Whenever a connection to destination server fails because of timeout or some connect failure AND last successful connection to server was before our connect() started, update the "last failed" timestamp. With these rules there are no unnecessary connect() attempts or waits to servers that are down. When the server does come back up, it's noticed immediately. --HG-- branch : HEAD

*-login: Moved most of the common code to login-common. --HG-- branch : HEAD

Removed unnecessary macro definitions from Makefiles. --HG-- branch : HEAD

Initial commit for v2.0 master rewrite. Several features are still missing. --HG-- branch : HEAD

Added configure --without-shared-libs to link built binaries against static libraries. The libraries are still built and installed, so this is mainly useful for making life easier for developers. --HG-- branch : HEAD

Build libdovecot.so and libdovecot-storage.so. Based on patch by Stephan Bosch. --HG-- branch : HEAD

Initial commit for config rewrite. --HG-- branch : HEAD

Check broken ssl-parameters.dat files better and give a better error message when seeing one. --HG-- branch : HEAD

Added --with-rundir configure option. --HG-- branch : HEAD

Upgrades to autoconf 2.5 and automake >1.4. --HG-- branch : HEAD

Added IMAP and POP3 proxying support. --HG-- branch : HEAD

missing sasl-server.h --HG-- branch : HEAD

Login process cleanups. Share more authentication code between pop3/imap. --HG-- branch : HEAD

Moved client side code for auth process handling to lib-auth. Some other login process cleanups. --HG-- branch : HEAD

login: Wait until we're connected to auth process before executing command from client. inetd usage: --group=name can now specify which login group to use. Default is the binary name before '-' character (ie. imap or pop3). --HG-- branch : HEAD

Somewhat working code to support loading Dovecot from inetd and such. It still needs possibility to specify which login process to use, and LOGIN and AUTHENTICATE commands shouldn't be allowed before we're connected to auth process. --HG-- branch : HEAD

Moved more auth code to login-common. --HG-- branch : HEAD

Moved common login process code to login-common, created pop3-login. --HG-- branch : HEAD