In incorperates changes from myself and a number of contributors.

This update to dbmirror provides:

-replication of sequence operations via setval/nextval
-DBMirror.pl support for logging to syslog
-changed the names of the tables to dbmirror_*  (no quotes required)
-Support for writitng SQL statements to files instead of directly to
 a slave database
-More options for DBMirror.pl in the config files.

Steven Singer