[LIB]: Boyer-Moore extension for textsearch infrastructure strike #2

Attached the implementation of the Boyer-Moore string search
algorithm for the new textsearch infrastructure.

I've added as well a note about the limitations that this approach
presents, as Thomas has remarked.

Signed-off-by: Pablo Neira Ayuso <pablo@eurodev.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/lib/Kconfig b/lib/Kconfig
index eeb429a..b62f685 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -72,6 +72,16 @@
 config TEXTSEARCH_KMP
 	tristate
 
+config TEXTSEARCH_BM
+        depends on TEXTSEARCH
+        tristate "Boyer-Moore"
+        help
+          Say Y here if you want to be able to search text using the
+          Boyer-Moore textsearch algorithm.
+
+          To compile this code as a module, choose M here: the
+          module will be called ts_bm.
+
 config TEXTSEARCH_FSM
 	tristate