[glib-networking] (7 commits) Non-fast-forward update to branch wip/tlssplit

[Ignacio Casal Quinteiro <icq src gnome org>]

The branch 'wip/tlssplit' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  a83a9f7... tls: split out non-gnutls-specific code from gnutls backend
  bbeb4dd... Add a generic HAVE_TLS flag to build the tests
  8ecd07b... base: add abstraction for push_io and pop_io
  666ed33... Split tests to take into account the backend
  13fc61b... base: move accept_peer_certificate to the base connection
  733e95d... Set the certificate even if there is a bad certificate erro

Commits added to the branch:

  3e7af08... tlsoutputstream: Use thread-safe GWeakRef (*)
  c13fefb... tls: split out non-gnutls-specific code from gnutls backend
  3fcbfec... Add a generic HAVE_TLS flag to build the tests
  0945d03... base: add abstraction for push_io and pop_io
  97d5655... Split tests to take into account the backend
  6379d26... base: move accept_peer_certificate to the base connection
  8c2372b... Set the certificate even if there is a bad certificate erro

(*) This commit already existed in another branch; no separate mail sent