lib-sql, lib-ldap: Fix link dependencies Fixes using the gold linker.

lib-sql: Add test driver Mock SQL driver

lib-sql: Fixed building Cassandra as plugin

cassandra: Added num_threads, connect_timeout and request_timeout settings.

Reverted d592417ec815 which added unnecessary code to Makefiles. The original problem it tried to solve was properly fixed by 46969c4cc57e. make will actually wait for processes to finish creating files before it continues to the next program that wants to access the file. As long as the dependencies are correct.

lib-sql: sqlite and cassandra libs were mixed up in the Makefile

lib-sql: Added support for Cassandra CQL as lib-sql backend. Implemented using DataStax's cpp-driver. Many things are still unimplemented. Column name specific functionality isn't even supported by the Cassandra library. So this can currently mainly be used as one of the dict backends for some simple functionality.

Makefile: Avoid make race conditions when generating files that are used as dependencies. The file creation needs to be atomic, otherwise another process can start trying to use an unfinished file. So we first create .tmp file and then mv it into the final one.

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

lib-sql: Don't link sql libraries to libdovecot-sql.so when building them as plugins.

Fixed compiling ldap/sql/gssapi plugins. I couldn't figure out any way to disable NOPLUGIN_FLAGS only for those plugins, so those flags are now always disabled for lib-sql library and auth binaries.

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

lib-sql: Install libdovecot-sql.so as well.

lib-sql: Fixed compiling --with-sql=plugin. Patch by Michal Hlavinka. --HG-- branch : HEAD

lib-sql: Use generic sql connection pooling code for mysql/pgsql. It's possible to give multiple host settings to do load balancing / HA. If one host is down, another one is tried. All queries are automatically retried in another host if they fail in first one. Since PostgreSQL support async queries, Dovecot can create multiple connections to the database as needed, so it can do lookups in parallel. The number of connections can be changed with maxconns=n in connect_query, the default is 5. --HG-- branch : HEAD

lib-sql: Renamed "sql pool" to "sql db cache", since that's what it is. --HG-- branch : HEAD

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

Makefiles: Use nodist_*_SOURCES to exclude generated .c files from dist. --HG-- branch : HEAD

Compiling fix for Solaris 7. --HG-- branch : HEAD

Flattened header namespace on install. --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

Get rid of imap/, pop3/, lda/ and sql/ module subdirs. It's all in lib/dovecot/ now. --HG-- branch : HEAD

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

Added SQL connection pools. --HG-- branch : HEAD

Removed DISTFILES which caused sources not to be included in tarball. --HG-- branch : HEAD

Added --enable-sql-plugins to build SQL drivers as plugins. Based on patch by Tomas Janousek. --HG-- branch : HEAD

Added --with-headers configure option to install .h files. --HG-- branch : HEAD

Still wasn't working with Solaris shell. Fix by Chris Wakelin --HG-- branch : HEAD

Some shells don't like empty for loops --HG-- branch : HEAD

"make dist" didn't include sources. --HG-- branch : HEAD

Added support for dynamically building SQL drivers. --HG-- branch : HEAD

SQLite support. Patch by Jakob Hirsch. --HG-- branch : HEAD

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

Created generic asynchronous SQL API and implemented MySQL and PostgreSQL drivers. MySQL is implemented synchronously because it's API doesn't provide async way to do it. Replaced pgsql and mysql userdb/passdb with generic sql userdb/passdb. --HG-- branch : HEAD