man: update wikipage URL, reformat SEE ALSO section

man: update wikipage URL, reformat SEE ALSO section

groff_man(7) provides plenty of useful requests/macros, and one of
them is .UR/.UE for URL formatting.

Man pages should be formatted with paragraphs (.P or .PP) requests,
and source text should not contain empty lines -- use empty request
instead (literally, single dot on its own line).

Signed-off-by: ivan tkachenko <me@ratijas.tk>
Link: https://lore.kernel.org/r/20201125015048.197683-1-me@ratijas.tk
Signed-off-by: Johannes Berg <johannes.berg@intel.com>