Created P4MASTERPORT in instance_vars to simplify logins to the master server in
the other scripts.
Changed other scripts to use P4MASTERPORT
Added clean up of statejcopy and checkpoints.rep directory to weekly_sync_replica so that
it properly resets a replica that is using journalcopy.
Moved umask to instance_vars since it wasn't being picked up when running things via crontab
Removed P4REPLICANAME from instance_vars since it wasn't being used anymore.
Added HOSTIP to mkdirs and to the P4PORT setting in instance vars so the server starts on
a specific IP address rather than all on the server. This avoids a bug where rpl.forward.login
doesn't work when logging in via localhost.