ircii: add iconv support.

Enables use of /set irc_encoding and display_encoding
ircii: add 20140831 bottle.

Closes #32181.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
ircii: general cleanup.
elasticsearch: depend on Java 7.

Closes #32164.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>