zlib & sqlite3: pkgconfig support

native pkg-config support for zlib and sqlite to elimate the need
to pass flags to configure or make stages in formulae.

Closes #34765.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
RabbitMQ 3.4.2

Closes #34895.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
rabbitmq: update 3.4.2 bottle.
kore 1.2 (new formula)

This commit add's a new formular to Homebrew for Kore. Kore is a fast
SPDY capable web server for web development in C.

Look at https://kore.io/ for further information.
kore: add 1.2 bottle.