pidgin/pidgin

Use the irc nick as the ident when the user has not specified on. Fixes PIDGIN-17435

Testing Done:
Connected to irc, whois'd myself and verified that the ident and real names were set to my handle and purple which are the defaults when they're not specified.

Bugs closed: PIDGIN-17435

Reviewed at https://reviews.imfreedom.org/r/153/
[Desktop Entry]
Name=Pidgin 3
GenericName=Internet Messenger
Comment=Chat over IM. Supports AIM, Google Talk, Jabber/XMPP, and more
Exec=pidgin3 %U
Icon=im.pidgin.Pidgin3
StartupNotify=true
Terminal=false
Type=Application
Categories=Network;InstantMessaging;
MimeType=x-scheme-handler/aim;x-scheme-handler/gg;x-scheme-handler/icq;x-scheme-handler/irc;x-scheme-handler/msnim;x-scheme-handler/sip;x-scheme-handler/xmpp;x-scheme-handler/ymsgr
@USES_MM_CHAT_SECTION@