imagemagick: make --without-magick-plus-plus optional

Closes #19254.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
john: enable OpenCL and OpenMP support for --jumbo

Closes #19105.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Add :hg build requirement.

Closes #19074.
Reorder dep spec types by frequency
gtkmm3 3.8.0

Fixes #19224.
cgal 4.2

Closes #19253.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Dart 21548

Closes #19259.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Don't accept Formula objects as dep specs

It was pointed out that this isn't used at all.
libgit2 0.18

Closes #19261.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
MongoDB 2.4.2

Closes #19266.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
mongodb: use arch requirement
libev 4.15

Closes #19273.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
nexus 2.3.1-01

Closes #19274.

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