doxygen 1.8.7

Fixes for --with-libclang and --with-doxywizard

Closes #28716.
doxygen: update 1.8.7 bottle.
io: python depends on addons being built
hevea 2.14
hevea: update 2.14 bottle.

Closes #29094.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
cabal-install 1.20.0.1
cabal-install: update 1.20.0.1 bottle.

Closes #29095.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
HexChat 2.9.6.1, fix HEAD

Closes #29077.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>