superenv cc: specify llvm-g++-4.2

We previously tried to call llvm-g++ under the name `g++`,
but this is now a link to clang on Xcode 5+.

Fixes #20691.
Clarify ENV.gcc, ENV.llvm c++ compiler names
python: clean up LINKFORSHARED inreplace

Fixes #20860.
Ipv6calc 0.94.1

Closes #20862.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Add an exception for imagemagick in build-time dep audit
libstfl: swig is a build-time dep
ruby-build 20130628

Closes #20867.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
aubio: fix audit
aubio: fix more audit warnings
ruby-build: fix sha1
ghostscript: fix typo

Also use std env when djvu is requested.

Closes #20787.
brew --env: Add missing CPATH environment variable

Closes #20813.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
dmd: add a conf and test

Closes #20687.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
xctool 0.1.5

Closes #20881.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
matlab2tikz 0.4.0

Closes #20876.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
git-ftp 0.8.4

Closes #20884.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
groonga 3.0.5

Closes #20873.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
groonga-normalizer-mysql 1.0.5

Closes #20874.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
mutt: Add HEAD option

Closes #20825.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
mutt: minor tweaks