Change comment handling for long lines in url_sig plugin (#7421)

 Change comment handling for long lines

There is a 300char max buffer size on lines url sig. If there is a comment longer than this then it will show up in the next fgets. If that happens to contain an `=` then it may end up being parsed as a rule otherwise it is thrown away but has an error printed.
This changes the comment handling so that if there is no `\n` seen at the end of the string in the buffer then it is assumed it is a long comment line and urlsig will continue eating the buffer until it hits a `\n`
3 files changed