libssh2 1.2.2

This release includes the following changes:

 o Support for the "aes128-ctr", "aes192-ctr", "aes256-ctr" ciphers
 o Support for the "arcfour128" cipher

This release includes the following bugfixes:

 o Fix crash when server sends an invalid SSH_MSG_IGNORE message

This release would not have looked like this without help, code, reports and
advice from friends like these:

 Simon Josefsson, Bob Alexander
 

        Thanks! (and sorry if I forgot to mention someone)