message: Change libssh2 submodule URL back to the official repo
diff: url = https://github.com/stinb/libgit2.git
  [submodule "dep/libssh2/libssh2"]
  path = dep/libssh2/libssh2
  - url = https://github.com/stinb/libssh2.git
  + url = https://github.com/libssh2/libssh2.git
  [submodule "dep/openssl/openssl"]
  path = dep/openssl/openssl
  url = https://github.com/openssl/openssl.git
  