Moved proxy '-e 3072' flag from p4p_base to Instance Vars file so it can be
changed on a per-instance basis. It is now part of the def'n of PROXY_V_FLAGS.
Moved PROXY_MON_LEVEL from p4_vars to Instance Vars file so it can be changed
on a per-instance basis.
Updated format settings in sdp_upgrade.sh, and added PROXY_MON_LEVEL to list
of user settings to be preserved during SDP upgrades.