gnunet: add missing libidn dependency

Closes #30414.
brew-versions: move to Contributions.

Eventually we'll move Contributions to a tap too.

Closes #30298.
tap_migrations: apple-gcc42 moved to dupes.
Extend with a module instead of aliasing on the singleton class
vimpc 0.09.1

Closes #30401.
youtube-dl 2014.06.25
youtube-dl: update 2014.06.25 bottle.

Closes #30443.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
muparser 2.23

Updated to current homepage and download location.
muparser: add 2.2.3 bottle.

Closes #30442.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
mpich2 3.1.1

Update to the latest release of MPICH (3.1.1)

Closes #30440.

Signed-off-by: Brett Koonce <koonce@gmail.com>
euca2ools: setuptools 5.2

Closes #30430.

Signed-off-by: Brett Koonce <koonce@gmail.com>
pike: 7.8.866

Closes #30453.

Signed-off-by: Brett Koonce <koonce@gmail.com>
mdr: fix installation.
mdr: add 1.0.0 bottle.

Closes #30446.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
qt5 5.3.1

Closes #30445.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
qt5: update 5.3.1 bottle.
brew.rb: handle -—help for internal/external cmds.

Only display —-help for internal commands and not for external ones;
they can handle the flag themselves.

Closes #26675.
References #26755.
Closes #30300.
brew: guard --help with nil cmd.
brew.rb: handle single usage flag case.
tomcat 8.0.9 stable