Unset GEM_HOME and GEM_PATH before running brew.rb

This was reported in Tigerbrew, but is a worthwhile fix everywhere.

Fixes mistydemeo/tigerbrew#177.
libextractor 1.3

Closes #26908.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
hunspell: Add caveats about how to obtain dictionaries

Fixes #21788.
Closes #26909.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
nrpe: add startup plist

Closes #25148.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
tika 1.5

Closes #26911.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
mackup 0.7

Closes #26913.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
tiger-vnc 1.3.0

Now doesn't contain its own FLTK snapshot, thus, new dependency.

Closes #26914.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>