dict-client: Support multiple values for lookups

dict-client: Pass through transaction timestamp to dict-server

dict-client: Server can now send command replies in any order. This way one slow lookup doesn't block all the other ones. This change keeps backwards compatibility in the dict protocol for both client and server.

dict-client: Add time spent in dict-server to "slow dict lookup" messages. This way you can see if the slowness was due to some communication problem between dict-client/server or internally in dict server. This change keeps backwards compatibility in the dict protocol for both client and server.

dict-client: Code cleanup - handle tab-unescaping before callbacks.

lib-dict: Added DICT_COMMIT_RET_WRITE_UNCERTAIN

dict-client: Use standard str_tabescape-functions There's no reason to reimplement them here separately.

lib-dict: Further remove APPEND

lib-dict: Code cleanup - give name for enum dict_protocol_cmd/reply

dict: Implemented dict_append()

lib-dict: Changed default dict socket name. --HG-- branch : HEAD

dict: Added support for async commits. Changed dict_atomic_inc() behavior. --HG-- branch : HEAD

dict proxy: Use base_dir as the default dict-server location. --HG-- branch : HEAD

dict server works again. --HG-- branch : HEAD

dict proxy: Handle async commits better. --HG-- branch : HEAD

Added a simple flat file dict backend. --HG-- branch : HEAD

Changed .h ifdef/defines to use <NAME>_H format. --HG-- branch : HEAD

Berkeley DB dict support is now enabled only when using --with-db configure option. --HG-- branch : HEAD

Dictionary changes: Added support for defining value's type. Key is still always a string. Added support for sorting the iteration replies. Added dict_unset(). Added Berkeley DB support. Most of the code written by Tianyan Liu. --HG-- branch : HEAD

Instead of passing URIs directly to dictionary server, it now accepts only named dictionaries which are configured in config file. SIGHUPing master now restarts dict server. --HG-- branch : HEAD

Don't use hardcoded /var/run/dovecot in dict-server path, but PKG_RUNDIR/dict-server. --HG-- branch : HEAD

Forgot to add --HG-- branch : HEAD