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.
davix 0.4.0-1

Closes #34894.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
davix: update 0.4.0-1 bottle.
nexus 2.11.0-02

nexus: Update to 2.11.0-02

Closes #34900.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Correct external command docs
flac: blacklist clang older than build 503

Fixes #34725.
net-snmp 5.7.3

Fixes #34904.
net-snmp: keg-only
lldpd 0.7.12
nut: bump revision for net-snmp changes
powerman: bump revision for net-snmp changes
lldpd: add 0.7.12 bottle.
net-snmp: update 5.7.3 bottle.
nut: update 2.7.2_1 bottle.
powerman: update 2.3.20_1 bottle.
docker 1.3.3

Closes #34907.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
docker: update 1.3.3 bottle.
boot2docker 1.3.3

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