Bug: cross.lua definition of strcmp_match does not handle ? meta-characters

The nginx replacement definition of strcmp_match does not allow for the '?' meta-character.

This should be fairly easy to fix.

I suspect it will also mishandle patterns containing Lua meta-characters such as '%', but that will be much harder to fix, and the patterns are less likely to contain them.

Open cross.lua and locate the nginx replacement definition of strcmp_match. Read how existing pattern matching handles meta-characters, then verify the '?' case against the issue description; done means patterns containing '?' match as expected without regressing existing behavior.

Written by the indexing model from the issue text.