HGKeeper

922c9e70900c

Rename protocol.[ch] to purpleprotocol.[ch]

Testing Done:
Connected an XMPP account.

Reviewed at https://reviews.imfreedom.org/r/1114/

For information on translating Pidgin, libpurple, and Finch, please see

our wiki page at https://developer.pidgin.im/wiki/TipsForTranslators