Make dtinfo work on OpenBSD.

strstream.h is now called "strstream" and is obsolete, but use it anyway until
all code is converted over.  This also needs std:: added, at least for GCC
4.2.1.  Lastly, when hardcoding the path to perl, /usr/bin/perl should be used
rather than anything else.

cde/programs/dtinfo/tools/misc/treeres

@@ -1,5 +1,5 @@
 # feed this into perl
-eval '(exit $?0)' && eval 'exec /usr/local/bin/perl $0 ${1+"$@"}' & eval 'exec /usr/local/bin/perl $0 $argv'
+eval '(exit $?0)' && eval 'exec /usr/bin/perl $0 ${1+"$@"}' & eval 'exec /usr/bin/perl $0 $argv'
    if 0;
 
 # treeres - resource file preprocessor