documented behavior. Only a certain set of file flags were recognized,
and "no" flags did not match files that have corresponding flags bits
turned off.
Fix and extend the -flags functionality as follows:
: -flags [-|+]<flags>,<notflags>
: The flags are specified using symbolic names (see chflags(1)).
: Those with the "no" prefix (except "nodump") are said to be
: <notflags>. Flags in <flags> are checked to be set, and flags in
: <notflags> are checked to be not set. Note that this is different
: from -perm, which only allows the user to specify mode bits that
: are set.
:
: If flags are preceded by a dash (``-''), this primary evaluates
: to true if at least all of the bits in <flags> and none of the bits
: in <notflags> are set in the file's flags bits. If flags are pre-
: ceded by a plus (``+''), this primary evaluates to true if any of
: the bits in <flags> is set in the file's flags bits, or any of the
: bits in <notflags> is not set in the file's flags bits. Otherwise,
: this primary evaluates to true if the bits in <flags> exactly match
: the file's flags bits, and none of the <flags> bits match those of
: <notflags>.
MFC after: 2 weeks
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