bugfix: gtls module did not correctly handle EGAIN (and similar) recv()
states. This has been fixed by introducing a new abstraction layer inside
gtls.
added (internal) error codes to error messages; added redirector to
web description of error codes
closes bug http://bugzilla.adiscon.com/show_bug.cgi?id=20
disabled compile warnings caused by third-party libraries
reduced number of compile warnings in gcc's -pedantic mode