lib-dovecot: Turn on RELRO

lib-dovecot: Avoid duplication of listing *.la in both Makefile.am and configure

Split parts of lib-dict into lib-dict-extra. Otherwise there's a circular dependency because lib-dict/dict-fs.c depends on lib-fs, while lib-fs/fs-dict.c depends on lib-dict. This becomes a problem when compiling --without-shared-libs, although for some reason it works for me while linking the Dovecot core, but not when linking external plugins.

Cleanup for libcharset's iconv linking. Linking libcharset.la now automatically links with the necessary iconv libraries.

stats process/plugin redesign to be more modular. The visible functionality doesn't actually change with this patch yet, but it allows other plugins/services to add their own fields to stats process. For example auth process could send auth success/failures or auth cache hits/misses.

Added initial libsasl for implementing client side SASL library. Initially supports PLAIN and LOGIN mechanisms.

Added libhttp to libdovecot.so

Makefile: Fixed building libdovecot.so

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.

Makefile: Link libdovecot-ssl with libdovecot. This fixes linking with e.g. OSX.

Added libtest to libdovecot.so

Removed duplicate libdovecot-ssl

Makefile: Fixed libdovecot-ssl to actually contain libssl-iostream

Added libdovecot-ssl for creating SSL servers more easily using lib-ssl-iostream.

Added lib-fs for simple filesystem accessing. Implemented POSIX, SiS and SiS-queue backends.

Added dns-client service and library for doing async dns lookups. --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

Added lib-master and mail-storage-service code that makes it easier to build new Dovecot binaries. Currently only the standalone applications (e.g. deliver) uses this. --HG-- branch : HEAD

Link LTLIBICONV, not LIBICONV. --HG-- branch : HEAD

Link -liconv to libdovecot.so if necessary. --HG-- branch : HEAD

lib-index belongs to libdovecot-storage, not to libdovecot. --HG-- branch : HEAD

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