Check if /dev/consctl is writeable so patch/create works inside acme's win.

Notes:
Sun May 22 00:48:37 EDT 2005 rsc
    I did what you meant to do.
    Note that 
    
    fn true { status='' }
    fn false { status=xxx }
    
    if(true; false) echo false
    if(false; true) echo true
    if(true && false) echo both
    if(false && true) echo both again
    
    are four different tests.  if you use a semicolon
    you just end up testing the last thing.  you wanted an &&.
    


Reference: /n/sources/patch/applied/patch-create-without-consctl
Date: Sat May 21 17:35:04 CES 2005
Reviewed-by: rsc

--- /rc/bin/patch/create	Sat May 21 17:34:34 2005
+++ /rc/bin/patch/create	Sat May 21 17:34:31 2005
@@ -54,7 +54,7 @@
 	chmod a+r $d/*
 }
 
-if(~ `{cat /proc/$pid/fd | awk 'NR==2{print $NF}'} */dev/cons){
+if(~ `{cat /proc/$pid/fd | awk 'NR==2{print $NF}'} */dev/cons; test -w /dev/consctl){
 	>/dev/consctl {
 		echo holdon
 		cat >$d/readme