Don't try (and fail) to fchmod /dev/stdout. Revert the manual page

to suggest the portable alternative to -p.

PR:		42356
Submitted by:	Kimura Fuyuki <fuyuki@hadaly.org>
MFC after:	1 week

usr.bin/uudecode/uudecode.c

@@ -96,6 +96,8 @@ main(int argc, char *argv[])
 			oflag = 1; /* output to the specified file */
 			sflag = 1; /* do not strip pathnames for output */
 			outfile = optarg; /* set the output filename */
+			if (strcmp(outfile, "/dev/stdout") == 0)
+				pflag = 1;
 			break;
 		case 'p':
 			if (oflag)

usr.bin/uuencode/uuencode.1

@@ -179,7 +179,7 @@ The following example extract a compress'ed tar
 archive from your mailbox
 .Pp
 .Bd -literal -offset indent -compact
-uudecode -p < $MAIL | zcat | tar xfv -
+uudecode -o /dev/stdout < $MAIL | zcat | tar xfv -
 .Ed
 .Sh SEE ALSO
 .Xr basename 1 ,