K 10
svn:author
V 6
jilles
K 8
svn:date
V 27
2011-02-05T14:01:46.050500Z
K 7
svn:log
V 285
sh: Forget all cached command locations on any PATH change.

POSIX requires this and it is simpler than the previous code that remembered
command locations when appending directories to PATH.

In particular,
  PATH=$PATH
is no longer a no-op but discards all cached command locations.

END