checkpatch: check for misuse of the link tags

"Link:" and "Closes:" tags have to be used with public URLs.

It is difficult to make sure the link is public but at least we can verify
the tag is followed by 'http(s)://'.

With that, we avoid such a tag that is not allowed [1]:

  Closes: <number>

Now that we check the "link" tags are followed by a URL, we can relax the
check linked to "Reported-by being followed by a link tag" to only verify
if a "link" tag is present after the "Reported-by" one.

Link: https://lore.kernel.org/linux-doc/CAHk-=wh0v1EeDV3v8TzK81nDC40=XuTdY2MCr0xy3m3FiBV3+Q@mail.gmail.com/ [1]
Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-5-d26d1fa66f9f@tessares.net
Signed-off-by: Matthieu Baerts <[email protected]>
Acked-by: Joe Perches <[email protected]>
Cc: Andy Whitcroft <[email protected]>
Cc: Bagas Sanjaya <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Dwaipayan Ray <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Cc: Kai Wasserbäch <[email protected]>
Cc: Konstantin Ryabitsev <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Lukas Bulwahn <[email protected]>
Cc: Thorsten Leemhuis <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions