K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2020-06-24T17:03:42.770251Z
K 7
svn:log
V 370
Add WITH_CLANG_FORMAT option

clang-format is enabled conditional on either WITH_CLANG_EXTRAS or
WITH_CLANG_FORMAT.  Some sources in libclang are build conditional on
either rule, and obviously the clang-format binary itself depends on the
rule.

clang-format could still use a manual page.

Reviewed by:	emaste
Differential Revision:	https://reviews.freebsd.org/D25427

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