In the regex [a-z-0-9] you don't need a backslash before the minus in
the middle, so remove that to bring it in line with other regexes.
In the regex [a-z\/-0-9] you do need a backslash in front of the minus
though, otherwise only the numbers 0 and 9 are allowed by the regex.
Let's use the imperative form in commit messages, as it is best
practice. I'm keeping "upstreamed", because that definitively happened
in the past when we merge a patch that deletes a pmaport.
Do not mark commit messages as NOK if the subject...
* has an uppercase letter (except for right after the colon)
* contains a dot or underscore before the colon
