sbcl: remove caveat

Homebrew no longer includes the maxima formula in mxcl/master, so the
message is only confusing.

Closes #20207.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
dnscrypt-proxy 1.3.0

Closes mxcl/homebrew#20205.

Closes #20206.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
pure 0.57

Closes #20203.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
pxz: does not build with clang

Use llvm or gcc, as pxz uses openmp.

Closes #20209.
RethinkDB: add launchd plist

Closes #20186.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
abcm2ps: fix path in test
abcMIDI 2013-05-10
ghi 0.9.0.20130504

Closes #20211.

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