[PATCH] Misc. minor fixes

Hi all.

Attached are unidiffs for some very minor things in the validator "check"
CGI script (revision 1.28).

* "voidwarn.diff"
    - Fixes two warnings from perl about strings used in void context.
      Both stem from constructs such as
        close FH || "failed: $!";
      where someone forgot to put in a "warn". They now read
        close FH or warn "failed: $!";

* "qw.diff"
    - Activates the commented out "qw()" which someone had apparantly
      tried to use under an old Perl and couldn't figure out why it
      didn't work. :-)

* "doctype.diff"
    - Fixes the missing double quotes in the HTML 4.0 strict DOCTYPEs
      I mentioned earlier today.

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