updated to libssh-0-9-5

, see https://www.libssh.org/2020/09/10/libssh-0-9-5/ with changelog

- CVE-2020-16135: Avoid null pointer dereference in sftpserver (T232)
- Improve handling of library initialization (T222)
- Fix parsing of subsecond times in SFTP (T219)
- Make the documentation reproducible
- Remove deprecated API usage in OpenSSL
- Fix regression of ssh_channel_poll_timeout() returning SSH_AGAIN
- Define version in one place (T226)
- Prevent invalid free when using different C runtimes than OpenSSL (T229)
- Compatibility improvements to testsuite

build_3rdparty.py

@@ -73,8 +73,8 @@
     'libssh': {
         'order' : 3,
         'shadow': True,
-        'url'   : 'https://git.libssh.org/projects/libssh.git/snapshot/libssh-0.9.4.tar.xz',
-        'sha1'  : '0d7e986353a1ced68af5e591f3d5053a6df3eaa9',
+        'url'   : 'https://git.libssh.org/projects/libssh.git/snapshot/libssh-0.9.5.tar.xz',
+        'sha1'  : 'f10c65dad5cbffe69b6631c34a60a8910a41088e',
         'target': {
             'mingw-w64': {
                 'result':   ['include/libssh/libssh.h', 'lib/libssh.a'],