Review 27743

C. Thomas Tyler v4.6.9:
* 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. v5.17.1:
* Extended '-skip version' meaning to also skip new live binary version
comparison checks.
* Fixed missing check for 'p4 info' against proxy port.

Related updates:
* A call to in the switch_db_files() function in
now skips the version check.
* A call to now skips the version check.
Tip: Use n and p to cycle through the changes.