lmtp: Move common recipient handling code to separate file.

lmtp: Moved client_rcpt_anvil_disconnect() from client.c to lmtp-local.c.

lib-lda: Moved LMTP client to lib-smtp. This makes the LMTP client available without dependency on lib-storage. For Dovecot v2.3, the newly created lib-smtp will evolve into a full client/server SMTP implementation. That will then remove the remaining SMTP code from lib-lda.

Add PIE and RELRO to binaries

lmtp: Added support for STARTTLS command.

MODULE_LIBS is now part of LIBDOVECOT. No need to explicitly link it everywhere.

--without-shared-libs: Link Dovecot libraries with --whole-archive flag for binaries. This removes the need for the ugly unused_objects lists for binaries, which were needed to avoid plugins from failing because they were missing some functions. Apparently there's no easy way to use --whole-archive properly with libtool, so there's now a rather ugly cc-wrapper.sh that does it. Also this is done only when GNU ld is deted. Most people are going to use --with-shared-libs though, so I don't think any of this is going to be a real problem.

Makefile: Removed mountpoint.o from unused_objects, since it's now included via lib-master.

Makefile: Fixed compiling lmtp with some SSL_LIBS options.

lmtp: Fixed loading Sieve plugin when configuring --without-shared-libs

lda, lmtp: Fixed library dependency tracking in Makefiles. --HG-- branch : HEAD

lib-lda is now an installed shared library. --HG-- branch : HEAD

lda, lmtp: Fixed using virtual plugin when not using shared libs. --HG-- branch : HEAD

lmtp: Link smtp-client.o explicitly so Sieve can use it. --HG-- branch : HEAD

lmtp: Link with all the same unused .o files as lda. --HG-- branch : HEAD

Makefiles: Separated LIBDOVECOT and LIBDOVECOT_DEPS. --HG-- branch : HEAD

lmtp: Added lmtp_proxy setting (it's no longer hardcoded to yes). --HG-- branch : HEAD

lmtp: Added initial support for proxying mails to other LMTP/SMTP servers. --HG-- branch : HEAD

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

lmtp: Added main.h to Makefile.am. --HG-- branch : HEAD

Initial implementation of LMTP server. Master process doesn't yet execute it though. --HG-- branch : HEAD