Support for PUBLISH (RFC 3903):
- API BREAK: pjsua_pres_create_uac() API CHANGED!! Added
  options in the function, to allow creating SUBSCRIBE without
  ";id=" parameter in the Event header.
- the generic event publication in pjsip-simple/publish.[hc]
- split PIDF and X-PIDF body generation and parsing into
  pjsip-simple/presence_body.c.
- allow NULL in module parameter in pjsip_endpt_add_capability()
- added "--publish" option in PJSUA.
- by default, PJSUA-LIB will not add ";id=" parameter in Event
  header in the SUBSCRIBE request since lots of server and
  user agents don't support this correctly.
- Set version to 0.5.7.6.



git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@685 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/src/pjsua-lib/pjsua_core.c b/pjsip/src/pjsua-lib/pjsua_core.c
index 9c011b8..c9bd248 100644
--- a/pjsip/src/pjsua-lib/pjsua_core.c
+++ b/pjsip/src/pjsua-lib/pjsua_core.c
@@ -524,6 +524,8 @@
     status = pjsip_pres_init_module( pjsua_var.endpt, pjsip_evsub_instance());
     PJ_ASSERT_RETURN(status == PJ_SUCCESS, status);
 
+    /* Init PUBLISH module */
+    pjsip_publishc_init_module(pjsua_var.endpt);
 
     /* Init xfer/REFER module */
     status = pjsip_xfer_init_module( pjsua_var.endpt );