Hybrid iso9660/HFS+ CDs made by the MacOS Finder can have alignment padding between
entries in the directory System Use area, which as far as I can see is contrary to the spec.
This patch allows 9660srv to read such directories correctly instead of going into an
infinite loop.

Reference: /n/sources/patch/applied/9660srv-apple-padding
Date: Mon May  2 14:42:45 CES 2005

--- /sys/src/cmd/9660srv/9660srv.c	Mon May  2 14:37:37 2005
+++ /sys/src/cmd/9660srv/9660srv.c	Mon May  2 14:37:33 2005
@@ -707,6 +707,11 @@
 			s += fs->suspoff;
 			sysl -= fs->suspoff;
 			for(; sysl >= 4 && have != (Hname|Hmode); sysl -= l, s += l){
+				if(s[0] == 0 && ((ulong)s & 1)){
+					/* MacOS pads individual entries, contrary to spec */
+					s++;
+					sysl--;
+				}
 				l = s[2];
 				if(s[0] == 'P' && s[1] == 'X' && s[3] == 1){
 					/* posix file attributes */