Differentiate GUI applications in man pages with icons.
This is the revert of the revert commit, now that the icon processing
was fixed in 89c0f84a28.
Revert: dae298e9df
Original: 74238d0aba
Co-authored-by: electrikmilk <brandonjordan124@gmail.com>
The URLs of the form `help://man/<section>/<page>` link to another help
page inside the help application. All previous relative page links are
replaced by this new form. This doesn't change any behavior but it looks
much nicer :^)
Note that man doesn't handle these new links, but the previous relative
links didn't work either.