17:07 salvadore 

math/maxima: Add ECL and SAGE options

- Add an ECL option to build maxima using ecl lisp. Option enabled by
  default so that Sage can work properly when using packages. [1]
- Add a SAGE option (implies ECL) to apply some patches so that Sage can
  work properly. This option is also enabled by default to get working
  Sage packages. [1]
- Fix a bug in xmaxima about documentation. This also introduces an
  XMAXIMA option (enabled by default) because to have xmaxima working we
  need to ensure that DOCS and TEST are enabled, which is done by using
  XMAXIMA_IMPLIES. This also has the advantage to remove USES= tk for
  users who want to disable XMAXIMA. [2]
- Modify TEST option so that it only installs tests, but it does not run
  them any more in the post-build-TEST-on target. Tests can still be run
  using "make test".

Submitted by:	thierry (based on) [1]
Reported by:	thierry [2]
Approved by:	thierry, tcberner (co-mentor)
Differential Revision:	https://reviews.freebsd.org/D24959