* test/data/auth/*: adapt to changes
* dbus/dbus-auth-script.c (_dbus_auth_script_run): add
USERID_BASE64 and change USERNAME_BASE64 to put in username not
userid
* dbus/dbus-keyring.c (_dbus_keyring_validate_context): prevent
more stuff from being in a context name, to make the protocol
simpler to deal with
* dbus/dbus-errors.c (dbus_error_has_name): new function
(dbus_error_is_set): new function
* dbus/dbus-auth.c: replace DBUS_STUPID_TEST_MECH auth
with DBUS_COOKIE_SHA1, implement DBUS_COOKIE_SHA1
* dbus/dbus-connection.c (dbus_connection_flush): also read
messages during a flush operation
* dbus/Makefile.am: remove dbus-md5 since it isn't currently used.
* dbus/dbus-connection.c (dbus_connection_set_change_sigpipe):
allow people to avoid setting SIGPIPE to SIG_IGN
(_dbus_connection_new_for_transport): disable SIGPIPE unless
we've been asked not to
