init: Add support for SOCK_SEQPACKET socket type

Change-Id: Ib264ecf9beb2685b070436d2bdec9655c7a31b47
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/init/readme.txt b/init/readme.txt
index a185790..df524a6 100644
--- a/init/readme.txt
+++ b/init/readme.txt
@@ -72,7 +72,7 @@
 
 socket <name> <type> <perm> [ <user> [ <group> ] ]
    Create a unix domain socket named /dev/socket/<name> and pass
-   its fd to the launched process.  <type> must be "dgram" or "stream".
+   its fd to the launched process.  <type> must be "dgram", "stream" or "seqpacket".
    User and group default to 0.
 
 user <username>