pmd 5.1.0

The compiled jars and documentation for PMD 5.1.0.

Closes #27841.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
pmd: general cleanup.
curl: Remove duplicate conditional

Also, make sure that the libmetalink option is declared.
curl: add 7.36.0 bottle.

Closes #27970.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
juju 1.17.7 (devel)
juju: add 1.16.6 bottle.

Closes #27971.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
vert.x-2.1RC2
vert.x: add 2.1RC2 bottle.