zookeeper: add launchd plist
zookeeper: add 3.4.6 bottle.

Closes #28401.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
x3270 3.3.14ga9
x3270: add 3.3.14ga9 bottle.

Closes #28413.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
brew-test-bot: check CompilerSelectionError twice.

It may be that even installing a new compiler doesn't fix things so
detect that case and skip the formula installation rather than erroring
out.
xctool: add 0.1.15 bottle.
Varnish 4.0.0
varnish: add 4.0.0 bottle.

Closes #28410.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
neo4j 2.0.2

Upgrade to Neo4j 2.0.2

Closes #28416.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
logstalgia 1.0.5

Closes #28194.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
notmuch: require Homebrew emacs if emacs is requested

Closes #24802.
mit-scheme: non-optional X11 dep

Enabling this until someone can figure out how to disable X, if that's
even possible.

Fixes #28224.
Fixes #28411.
libopkele: add option for building docs

Closes #24790.
Remove dead constant
Document some unanswered questions in the Xcode module
Remove unnecessary xcode-select check

This is handled here:
https://github.com/Homebrew/homebrew/blob/67fbb313da8843234c4d1785c9c074af5a025394/Library/brew.rb#L34-46
Remove another unnecessary check
Don't call xcrun twice
Remove yet another xcode-select check
Xcode.bad_xcode_select_path? is used only once, so inline it