K 10
svn:author
V 6
kevans
K 8
svn:date
V 27
2017-11-04T01:16:31.697656Z
K 7
svn:log
V 528
Mk/bsd.java.mk: Strict JAVA_{VERSION,VENDOR,ERROR} validation

Currently, validation of JAVA_{VERSION,VENDOR,ERROR} does not constitute an
error and make(1) will happily continue, potentially doing the wrong thing.
Adjust the behavior as follows:

- Only validate each var if it's defined
- Remain verbose about what error exists and what's expected
- Fail the build if validation fails

bsd.java.mk exhibited this behavior up until r217132 inadvertently changed
it to be non-fatal.

PR:		220737
Approved by:	portmgr (bdrewery)

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