ppp: version bump to 2.4.5

Bump to the current version of PPP.

A few of the patches are either in 2.4.5 or something functionally equivalent is, so those patches were removed.

1 patch was added to accommodate pppol2pv3_addr which is referenced in a linux kernel header file, but isn't defined in the kernel header files packaged with PPP.

Redux: re-instate the commenting out of the exponential back-off as requested by Felix.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27818 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/ppp/patches/430-pppol2tpv3-struct.patch

@@ -0,0 +1,23 @@
+--- a/include/linux/if_pppol2tp.h
++++ b/include/linux/if_pppol2tp.h
+@@ -32,6 +32,20 @@ struct pppol2tp_addr
+ 	__u16 d_tunnel, d_session;	/* For sending outgoing packets */
+ };
+ 
++/* The L2TPv3 protocol changes tunnel and session ids from 16 to 32
++ * bits. So we need a different sockaddr structure.
++ */
++struct pppol2tpv3_addr {
++	pid_t	pid;			/* pid that owns the fd.
++					 * 0 => current */
++	int	fd;			/* FD of UDP or IP socket to use */
++
++	struct sockaddr_in addr;	/* IP address and port to send to */
++
++	__u32 s_tunnel, s_session;	/* For matching incoming packets */
++	__u32 d_tunnel, d_session;	/* For sending outgoing packets */
++};
++
+ /* Socket options:
+  * DEBUG	- bitmask of debug message categories
+  * SENDSEQ	- 0 => don't send packets with sequence numbers