[glib-networking] (6 commits) Non-fast-forward update to branch mcatanzaro/#20

[Michael Catanzaro <mcatanzaro src gnome org>]

The branch 'mcatanzaro/#20' 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:

  c308ba7... Always fire TLS source when buffered data is available to r

Commits added to the branch:

  5b7e37f... Account for ongoing ops in check function
  8ccd464... Implement tls_source_sync() using check functions
  6ca388a... Hold op_mutex during base_check
  61222d1... Improve clarity of dispatch function
  ebfd407... gnutls: account for internal TLS buffer in check function
  0010d20... Always notify on op completion