flagfmt didn't mention the -p or -M flags. i was getting
a usage message from {echo hello|lp}. i can't see why it hasn't
already been noticed though, which makes me suspicious that
this fix might be wrong. here it is anyway, FWIW.

Reference: /n/sources/patch/applied/lp-options
Date: Thu Apr 27 17:22:32 CES 2006
Signed-off-by: rog@vitanuova.com

--- /rc/bin/lp	Thu Apr 27 17:20:42 2006
+++ /rc/bin/lp	Thu Apr 27 17:20:32 2006
@@ -91,7 +91,7 @@
 YOFF=''
 
 # Process options
-flagfmt='D,H,L,Q,R,r,q,c copies,d printer,f font.size,i src,k jobnos,l lines,m magnify,n lpages,o pages,u userid,x offset,y offset'
+flagfmt='D,H,L,Q,R,r,q,c copies,d printer,f font.size,i src,k jobnos,l lines,m magnify,n lpages,o pages,u userid,x offset,y offset,p proc,M mach'
 argv0=lp
 
 if(! ifs=() eval `{aux/getflags $*}) {