BUG/MINOR: peers: Wrong server name parsing.

BUG/MINOR: peers: Wrong server name parsing.

This commit was not complete:
   BUG/MINOR: peers: Wrong "server_name" decoding.
We forgot forgotten to move forward <msg_cur> pointer variable after
having parse the server name string.

Again this bug may happen only if we add stick-table new data type after
the server name which is the current last one. Furthermore this bug is
visible only the first time a peer sends a server name for a stick-table
entry.

Nothing to backport.