Doesn't follow search rules to find .p4config

[robertlugg]

If .p4config is in the top-level directory everything seems to be OK. However, if its in the Parent, the extension doesn't honor it. Or, it may be similar to the issues #166 and #176

Request is to look for .p4config based on the P4CONFIG environment variable and the rules defined by Helix/Perforce: https://www.perforce.com/manuals/cmdref/Content/CmdRef/P4CONFIG.html

[mjcrouch]

Hi

You might want to try my fork

I reworked this in v4.0.0 - a couple of weeks ago - so it should detect all p4config files using the built in logic from p4