MFV r270197:

Illumos issue:
    5066 remove support for non-ANSI compilation
    5068 Remove SCCSID() macro from <macros.h>

MFC after:	2 weeks


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270382 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f