It seems r 284345 accidently guarded a bunch of the LZMA variants of grep under MK_BSD_GREP. This change seems unrelated to the overall changeset of adding META_MODE support. https://svnweb.freebsd.org/base/head/usr.bin/grep/Makefile?r1=277939&r2=284345
Over to committer of r284345.
To be honest, I think the fact that we installed bsdgrep as xzgrep WITHOUT_BSD_GREP was a mistake. If we bring back some of these variants for gnugrep (which we probably should), I would prefer it be done as a script or something that invokes /usr/bin/grep. The behavior between bsdgrep and gnugrep as they currently exist in base has departed quite a bit. I would also like to not weed through bug reports double-checking that they were actually gnugrep and not bsdgrep disguised as xzgrep.
This is now addressed by: https://svnweb.freebsd.org/base?view=revision&revision=332993
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