migration: Add comments to channel functions

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NDaniel P. Berrange <berrange@redhat.com>

migration/channel.c

@@ -19,6 +19,14 @@
 #include "qapi/error.h"
 #include "io/channel-tls.h"
 
+/**
+ * @migration_channel_process_incoming - Create new incoming migration channel
+ *
+ * Notice that TLS is special.  For it we listen in a listener socket,
+ * and then create a new client socket from the TLS library.
+ *
+ * @ioc: Channel to which we are connecting
+ */
 void migration_channel_process_incoming(QIOChannel *ioc)
 {
     MigrationState *s = migrate_get_current();
@@ -41,6 +49,13 @@ void migration_channel_process_incoming(QIOChannel *ioc)
 }
 
 
+/**
+ * @migration_channel_connect - Create new outgoing migration channel
+ *
+ * @s: Current migration state
+ * @ioc: Channel to which we are connecting
+ * @hostname: Where we want to connect
+ */
 void migration_channel_connect(MigrationState *s,
                                QIOChannel *ioc,
                                const char *hostname)