K 10
svn:author
V 5
rezny
K 8
svn:date
V 27
2017-08-20T16:31:39.712734Z
K 7
svn:log
V 436
Build with reasonable defaults to avoid passing NULL to unprepared users.

Environment variables still take precedence. Without built-in defaults, NULL
will be returned if the environment is empty. Some consumers fail to check
for this condition and exhibit ill behavior.

While here, remove MAKE_JOBS_UNSAFE as nobody recalls why it was put there
originally and parallel builds work in all my test environments.

Reported by:	tcberner

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