* lib/regextype.c (regex_map): Permute the entries to list POSIX
dialects before other ones, so that we don't end up with a
dangling reference to `ed' regular expressions when
context=findutils. Remove trailing white space from the output.
* doc/regexprops.texi: Regenerate this file, so that we no longer
have a dangling reference to the `ed' dialect.
* doc/find.texi (Regular Expressions): Point out the difference
between Emacs regular expressions and findutils regular
expressions: in findutils "." will match newline.
* find/find.1: Likewise.
* locate/locate.1: Likewise. Also document the --regextype option.