clients.console: add 'echo' argument to recv_char

darcs-hash:20090330120425-b2873-997e8a3ee16e08924121ef306b8aa9b20eae5d7a
sip_session: remove unused import

darcs-hash:20090330120532-b2873-8825e6fac82bae53d24df70862e7714bf639b95b