stopped wrapping passwd in a SaslM computation for the time-being
SaslHandler now takes password and does not take hostname
minor formatting and documentation changes
runSasl where-local
SaslElement moved to Sasl/Types.hs
add sAuthzid to XmppConnection
add sAuthzid to XmppConnection more work on sasl infrastructure
move more stuff from DigestMd5 to Common
more work on sasl infrastructure