[MINOR] added the "tcpsplice" option

it does nothing yet except set the minimal options.
diff --git a/include/types/backend.h b/include/types/backend.h
index f70a370..d6079ad 100644
--- a/include/types/backend.h
+++ b/include/types/backend.h
@@ -57,6 +57,7 @@
 #define	PR_O_TPXY_CIP	0x04000000	/* bind to the client's IP address when connect()ing */
 #define	PR_O_TPXY_CLI	0x06000000	/* bind to the client's IP+port when connect()ing */
 #define	PR_O_TPXY_MASK	0x06000000	/* bind to a non-local address when connect()ing */
+#define	PR_O_TCPSPLICE	0x08000000      /* delegate data transfer to linux kernel's tcp_splice */
 
 
 #endif /* _TYPES_BACKEND_H */
diff --git a/include/types/global.h b/include/types/global.h
index 40c6c99..222d4fe 100644
--- a/include/types/global.h
+++ b/include/types/global.h
@@ -42,6 +42,7 @@
 #define LSTCHK_CAP_BIND	0x00000001	/* check that we can bind to any port */
 #define LSTCHK_CTTPROXY	0x00000002	/* check that tproxy is enabled */
 #define LSTCHK_NETADM	0x00000004	/* check that we have CAP_NET_ADMIN */
+#define LSTCHK_TCPSPLICE	0x00000008	/* check that linux tcp_splice is enabled */
 
 /* FIXME : this will have to be redefined correctly */
 struct global {
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 5017d50..8b6e94d 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -94,6 +94,10 @@
 	{ "allbackups",   PR_O_USE_ALL_BK, PR_CAP_BE, 0 },
 	{ "persist",      PR_O_PERSIST,    PR_CAP_BE, 0 },
 	{ "forceclose",   PR_O_FORCE_CLO | PR_O_HTTP_CLOSE, PR_CAP_BE, 0 },
+#ifdef CONFIG_HAP_TCPSPLICE
+	{ "tcpsplice",    PR_O_TCPSPLICE , PR_CAP_BE|PR_CAP_FE, LSTCHK_TCPSPLICE|LSTCHK_NETADM },
+#endif
+
 	{ NULL, 0, 0 }
 };