(Only the first 10 of 16 ports in this commit are shown above. )
Add new ports for GIMP Manual:
The GIMP User Manual is distributed as a set of HTML pages for use
with the internal GIMP help browser or any web browser.
PR: ports/145650, ports/145652
Submitted by: SimaMoto, RyoTa <liangtai.s4 at gmail.com>