Update cad/gmsh to 2.13.2; fix knob issue; other changes
- Upgrade to version 2.13.2
- Update MASTER_SITES to only include new gmsh site
- Remove no-longer-needed definitions of DISTFILES, EXTRACT_ONLY, and WRKSRC
- The licensing situation is simpler now: Gmsh itself is released under
GPLv3+ [1], TetGen under AGPLv3+ [2], and METIS under an APACHE2 license [3]
For now, TAUCS is the only component released under a non-standard license [4]
- Fix misnamed KNOB in KNOB_DESC=, so `make config` shows descriptions
- Fix errors/warnings reported by portlint and poudriere testport
- Add missing entries to LIB_DEPENDS=
- Add blaslapack to USES=
- Change USE_GL=yes to USE_GL=gl glu
- Add USE_XORG=x11 xext xfixes xft
- Redo patches with make makepatch
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