* Fixed issue where where patch-only upgrades of instances after the first
in a multi-instance environment are skipped.
* Corrected error message for scenario where downgrades are attempted; the
logic was correct but error message was confusing.
* Extended '-skip version' meaning to also skip new live binary version
* Fixed missing check for 'p4 info' against proxy port.
* A call to verify_sdp.sh in the switch_db_files() function in backup_functions.sh
now skips the version check.
* A call to daily_checkpoint.sh now skips the version check.