repo 1.19

Closes #16951.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
libsmf 1.3

Closes #16773.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
libsmf: add pkg-config dep
mpssh 1.3.1

Closes #16534.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
Prevent repeated lookups of nil-valued keys
Prune LinkedKegs relative to correct path

Fixes #16948.
htop: fix build by creating empty m4 folder

Closes #14551.
Don't remove linked formulas when doing a 'cleanup'

Closes #16947.

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