[glib] gio: Document that GSocket is not thread safe

[Philip Withnall <pwithnall src gnome org>]

commit 2b247e158991c9698c7cb53731395de2b69cb086
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Apr 16 19:03:56 2014 +0100

    gio: Document that GSocket is not thread safe
    
    https://bugzilla.gnome.org/show_bug.cgi?id=726318

 gio/gsocket.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gio/gsocket.c b/gio/gsocket.c
index 067431b..6713d0a 100644
--- a/gio/gsocket.c
+++ b/gio/gsocket.c
@@ -117,6 +117,10 @@
  * account the fact that your program will not automatically be killed
  * if it tries to write to %stdout after it has been closed.
  *
+ * Like most other APIs in GLib, #GSocket is not inherently thread safe. To use
+ * a #GSocket concurrently from multiple threads, you must implement your own
+ * locking.
+ *
  * Since: 2.22
  */