res_pjsip: delay contact pruning on Asterisk start

Move the call to ast_sip_location_prune_boot_contacts() *after* the call
to ast_res_pjsip_init_options_handling() so that
res/res_pjsip/pjsip_options.c is informed about the contact deletion and
updates its sip_options_contact_statuses list. This allows for an AMI
event to be sent by res/res_pjsip/pjsip_options.c if the endpoint
registers again from the same remote address and port (i.e., same URI)
as used before the Asterisk restart.

ASTERISK-30109
Reported-by: Michael Neuhauser

Change-Id: I1ba4478019e4931a7085f62708d9b66837e901a8

Author: mneuhauser

res/res_pjsip.c

@@ -2766,6 +2766,14 @@ static int load_module(void)
 		goto error;
 	}
 
+	/*
+	 * It is OK to prune the contacts now that
+	 * ast_res_pjsip_init_options_handling() has added the contact observer
+	 * of res/res_pjsip/pjsip_options.c to sorcery (to ensure that any
+	 * pruned contacts are removed from this module's data structure).
+	 */
+	ast_sip_location_prune_boot_contacts();
+
 	if (ast_res_pjsip_init_message_filter()) {
 		ast_log(LOG_ERROR, "Failed to initialize message IP updating. Aborting load\n");
 		goto error;

res/res_pjsip/pjsip_configuration.c

@@ -2280,8 +2280,6 @@ int ast_res_pjsip_initialize_configuration(void)
 
 	load_all_endpoints();
 
-	ast_sip_location_prune_boot_contacts();
-
 	acl_change_sub = stasis_subscribe(ast_security_topic(), acl_change_stasis_cb, NULL);
 	stasis_subscription_accept_message_type(acl_change_sub, ast_named_acl_change_type());
 	stasis_subscription_set_filter(acl_change_sub, STASIS_SUBSCRIPTION_FILTER_SELECTIVE);