[Bug 280676] grep default recursive behavior differs from manpage

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280676

            Bug ID: 280676
           Summary: grep default recursive behavior differs from manpage
           Product: Base System
           Version: 14.1-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: radoslaw.piliszek@gmail.com

FreeBSD's `grep(1)` describes that `-p` is the default when using `-R`, i.e.,
that symlinks are *not* followed. However, it seems that actually `-S` is the
default, i.e., symlinks *are* followed (when using only `-R`). Notably, the man
page is internally coherent (both `-p` and `-S` descriptions claim that `-p` is
the default).

I don't know FreeBSD's previous behavior of grep so cannot comment whether it's
the man page that is supposed to be wrong or grep's behavior but they certainly
disagree on the matter.

Bug found on Chimera Linux and verified on FreeBSD 14.1-STABLE which is the
source of Chimera Linux's base utils at the moment.

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