* sofia-sip/su_wait.h: added su_timer_deferrable(), su_task_wakeup(), su_root_set_max_defer(), su_root_get_max_defer() and su_task_deferrable().
   
  Added implementation to different main-loop implementations in
  libsofia-sip-ua/su.
  
  Fixed su_task_is_running(). 
    
  In libsofia-sip-ua/su, added tests for deferred timers. 
  
  In libsofia-sip-ua-glib/su-glib/su_source.c, added su_source_wakeup() and
  su_source_is_running(). Using su_base_port_send() instead of
  su_source_send(). Using su_base_port_deferable() and
  su_base_port_max_defer(), too.



git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@11852 d0543943-73ff-0310-b7d9-9358b9ac24b2