pidgin/pidgin

I guess there are NSS versions that support the SSL_VersionRange stuff, but not TLS 1.2 - I thought they came in at the same time.
For information on writing a plugin for Purple, Pidgin or Finch, go
http://developer.pidgin.im and click on API. From there, see the
HOWTOs in the "Related Pages" section.
You can also generate this documentation locally by installing
doxygen and graphviz dot, then running "make docs" in the
source tree. The documentation will be in the docs/html directory.