Fixing "Undefined variable $backURL" in enforeLogin function

[LABCAT]

Note, there is already a pull request for this issue which looks to be abandoned:
#81

This pull request is a simpler fix which doesn't remove the call to validSiteURL.

Unfortunately, I also do not have time to contribute a unit test to the repository.

[GuySartorelli]

Please just swap all instances of $backURL to $backUrl (or vice versa) - it seems clear they were all meant to be the same variable.

[LABCAT]

@GuySartorelli I have updated the merge request as suggested.

[GuySartorelli]

Nice, thanks! I've retargetted this PR to the 4.4 branch so it can be released as a patch. Can you please reset the PR to not include the extra commits retargetted it has picked up?
Easiest way is probably to do this:

git branch -D patch-1
git checkout 4.4
git checkout -b patch-1
git cherry-pick 3a544fb 6618825
git push patch-1 --force

This will delete your current branch locally, then recreate a new branch with the same name, but this time based on the 4.4 branch. It'll then cherry-pick in your original commits, and push them to the remote, which will update this PR.

[LABCAT]

@GuySartorelli branch has now been rebased onto 4.4 and ready to merge.

[GuySartorelli]

Awesome, thanks for that. Just letting CI run and will merge on green.

[GuySartorelli]

Released as 4.4.1