mariadb: guard post-install for client-only builds

Closes #20519.
uade: add HEAD
cfengine: use http download

Closes #20339.
lftp: hotfix for Snow Leopard

Closes #20435.
jemalloc 3.4

Closes #20521.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
gmp 5.1.2

Closes #20515.

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

Move ppl to homebrew-versions as it depends on gmp4.

Closes #17917.
Add brew-profile to contrib

This command loads all formulae and dumps an HTML profile report to
stdout. So e.g. `brew profile >/tmp/report.html`
stress: update urls

Closes #20526.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Add minimum OS X version requirement

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Use minimum OS X requirement