[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:

  378c773... tls: split out non-gnutls-specific code from gnutls backend
  af7fa5b... Add a generic HAVE_TLS flag to build the tests
  6cf0c57... base: add abstraction for push_io and pop_io
  9102575... Split tests to take into account the backend
  023e3e0... base: move accept_peer_certificate to the base connection
  562b685... Set the certificate even if there is a bad certificate erro

Commits added to the branch:

  8d43835... gnutls: Implement half-duplex close in GTlsOutputStreamGnut (*)
  942e674... tls: split out non-gnutls-specific code from gnutls backend
  c30a08c... Add a generic HAVE_TLS flag to build the tests
  9e894a9... base: add abstraction for push_io and pop_io
  360a69b... Split tests to take into account the backend
  27e74ea... base: move accept_peer_certificate to the base connection
  8f329b7... Set the certificate even if there is a bad certificate erro

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