Patches for dtscreen, dtsearchpath, dtsession on OBSD.

Do not redefine round(3), and provide a manpath for OpenBSD.
(this is one of the few things that need to be adjusted for other BSDs)

cde/programs/dtscreen/worm.c

@@ -88,12 +88,14 @@ typedef struct {
     int         size[MAXCOLORS];
 }           wormstruct;
 
+#if !defined(CSRG_BASED)
 int
 round(x)
     float       x;
 {
     return ((int) floor((double) x));
 }
+#endif
 
 
 void