Improved the management of soap request/response.

The director has the opportunity to change the configuration of AC in join
connection. The virtual interfaces which encapsulate the wifi stations is
managed dynamically by the Director.
The AC must request authorization from Director for associate a station.

src/common/capwap_rwlock.c

@@ -38,7 +38,7 @@ void capwap_rwlock_wrlock(capwap_rwlock_t* lock) {
 }
 
 /* */
-void capwap_rwlock_exit(capwap_rwlock_t* lock) {
+void capwap_rwlock_unlock(capwap_rwlock_t* lock) {
 	ASSERT(lock != NULL);
 
 	pthread_rwlock_unlock(&lock->rwlock);