snap7 1.2.1

Closes #28921.
snap7: add 1.2.1 bottle.
snap7: simplify build
mercurial: remove head support

Closes #26822.
mercurial: vendor docutils

Install docs without requiring a global docutils
nload: fails with clang

Closes #27823.
Remove iulib

Closes #27238.
libwmf: depends on jpeg

Closes #28584.
par2: fix assert failure

Closes #28795.
Closes #28796.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
pure 0.60

Closes #28961.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
pure: update 0.60 bottle.
pure: remove unused autotools deps
Drop emacs dep audit

cf. #24802.
Move clam to boneyard.

Fails to build with clang or on non-/usr/local installs.

Closes #23024.
perlmagick: fix to install to any $(brew --prefix)

not just /usr/local

removing unnecessary ENV appends

only one additional change to Makefile.PL from original formula to
install to non /usr/local
perlmagick: update 6.88 bottle.

Closes #28787.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
gwyddion: add python support

Add optional dependencies for Python support. Includes a patch that fixes
lazy loading Gwyddion libraries from the stand-alone gwy module.

Closes #28706.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
libdnet: add 1.12 bottle.
taglib: add 1.9.1 bottle.
libdvdread: add 4.2.0 bottle.