Miranda 0.9.50

# Enhancements:
– IPv6 support
– Unicode avatar paths support
– Per plugin language pack support
– Gadu-Gadu: Added login notifications
# Bugfixes:
– Updated zlib library
– Updated scriver with new search engines
– Improved image handling services
– Gadu-Gadu: Improved error notifications
– Gadu-Gadu: Improved cancelling connection attempt
– Yahoo: Fixed contact authorization issues
– Yahoo: Fixed client detection