Follow up to 2764bc8e06d51876b6796d6080c6ac51e20f3332
checksrc.pl -i4 -m79 -ASIZEOFNOPAREN -ASNPRINTF -ACOPYRIGHT -AFOPENMODE tests/*.[ch]
files: channel.c, test_agent_forward_succeeds.c, libssh2_priv.h, libssh2.h, ssh2_agent_forwarding.c notes: * Adding SSH agent forwarding. * Fix agent forwarding message, updated example. Added integration test code and cmake target. Added example to cmake list. credit: pkittenis