Add native disk metrics thanks to delphij, Ruben Kerkhof
<ruben@rubenkerkhof.com>, and myself. [1]

Fix Python option when building with debug enabled python [2]

PR: 202327 [1]
PR: 201773 [2]
Submitted by: brd [1]
Submitted by: Suraj Ravichandran <suraj@ixsystems.com> [2]
Approved by: Krzysztof <ports@bsdserwis.com> (maintainer), bdrewery (mentor)