[network-manager-openvpn] (12 commits) ...all: merge branch 'th/cleanup-bgo790612'

[Thomas Haller <thaller src gnome org>]

Summary of changes:

  103cf52... build: use AC_GNU_SOURCE for _GNU_SOURCE define (*)
  055fe25... shared: re-import shared files
  9bc3db5... properties: move include of "nma-cert-chooser.h" to default
  cb0dd04... properties: don't use strlen() for checking for non-empty s
  c721b8d... properties: merge "properties/auth-helpers.c" in "nm-editor
  b4565c9... properties: various cleanups in "properties/nm-openvpn-edit
  ab315f2... service: minor cleanup in update_io_data_from_vpn_setting()
  1387520... service: log a debug message on connect()
  9ae47ae... service: unifiy requesting secrets
  f682c9f... properties: don't require username in GUI
  3d916e1... auth-dialog: various code cleanup
  f5b9b78... all: merge branch 'th/cleanup-bgo790612'

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