Revert 439c736, 29798a8

This puts back the call to __gen_rtag(). Its removal was a
misunderstanding of how the rtag works. mod_init creates the file,
__gen_rtag() just returns the path to the file so that it can be checked
to see if the file exists.
Merge pull request #5781 from terminalmage/quickfix

Revert 439c736, 29798a8