utils.social phonesFromText issues with slashes

[bwundo]

On pages with phone numbers formatted like this: 0175/234234, 0160/345345 and +49151/456456

It just adds 234234, 345345 and 456456 to the result set "phonesUncertain".

[mnmkng]

cc @jancurn

[jancurn]

Indeed, slashes are currently not recognized. PRs welcome.

On a related note, phone number detection using regular expressions is rather poor, to make it work properly, we'd need to use some AI extractor.