* Core/SSH: libssh2 upgraded to version 1.11.1
* Core/SSH: SFtpStream: Don't try to read file attrs if the file is newly created.
* Core/SSH: Error log fix.
Core/SSH: Docs are updated to reflect the elliptic curve KEX and PK methods.
git-svn-id: svn://ultimatepp.org/upp/trunk@15950 f0d560ea-af0d-0410-9eb7-867de7ffcac7