libssh2 1.2.7

This release includes the following changes:

 o Added Watcom makefile

This release includes the following bugfixes:

 o Better handling of invalid key files
 o inputchecks: make lots of API functions check for NULL pointers
 o libssh2_session_callback_set: extended the man page
 o SFTP: limit write() to not produce overly large packets
 o agent: make libssh2_agent_userauth() work blocking properly
 o _libssh2_userauth_publickey: reject method names longer than the data
 o channel_free: ignore problems with channel_close()
 o typedef: make ssize_t get typedef without LIBSSH2_WIN32
 o _libssh2_wait_socket: poll needs milliseconds
 o libssh2_wait_socket: reset error code to "leak" EAGAIN less
 o Added include for sys/select.h to get fd.set on some platforms
 o session_free: free more data to avoid memory leaks
 o openssl: make use of the EVP interface
 o Fix underscore typo for 64-bit printf format specifiers on Windows
 o Make libssh2_debug() create a correctly terminated string
 o userauth_hostbased_fromfile: packet length too short
 o handshake: Compression enabled at the wrong time
 o Don't overflow MD5 server hostkey

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

 Alexander Lamaison, Guenter Knauf, Peter Stuge, Simon Josefsson, Lars Nordin,
 John Little, Daniel Stenberg, TJ Saunders, Tor Arntsen
 
        Thanks! (and sorry if I forgot to mention someone)