pknock: move into separate directory

There will be a number of pknock-related tools, e.g. the trigger
programs, so move that out to its own directory.

configure.ac

@@ -105,5 +105,5 @@ AC_SUBST([ksourcedir])
 AC_SUBST([xtlibdir])
 AC_CONFIG_FILES([Makefile Makefile.iptrules Makefile.mans
 	extensions/Makefile extensions/ACCOUNT/Makefile
-	extensions/ipset/Makefile])
+	extensions/ipset/Makefile extensions/pknock/Makefile])
 AC_OUTPUT

extensions/Kbuild

@@ -26,7 +26,7 @@ obj-${build_ipset}       += ipset/
 obj-${build_ipv4options} += xt_ipv4options.o
 obj-${build_length2}     += xt_length2.o
 obj-${build_lscan}       += xt_lscan.o
-obj-${build_pknock}      += xt_pknock.o
+obj-${build_pknock}      += pknock/
 obj-${build_psd}         += xt_psd.o
 obj-${build_quota2}      += xt_quota2.o
 

extensions/Mbuild

@@ -21,6 +21,6 @@ obj-${build_ipset}       += ipset/
 obj-${build_ipv4options} += libxt_ipv4options.so
 obj-${build_length2}     += libxt_length2.so
 obj-${build_lscan}       += libxt_lscan.so
-obj-${build_pknock}      += libxt_pknock.so
+obj-${build_pknock}      += pknock/
 obj-${build_psd}         += libxt_psd.so
 obj-${build_quota2}      += libxt_quota2.so

extensions/pknock/Kbuild

@@ -0,0 +1,5 @@
+# -*- Makefile -*-
+
+EXTRA_CFLAGS = -I${src}/..
+
+obj-m += xt_pknock.o

extensions/pknock/Makefile.am

@@ -0,0 +1,3 @@
+# -*- Makefile -*-
+
+include ../../Makefile.extra

extensions/pknock/Mbuild

@@ -0,0 +1,3 @@
+# -*- Makefile -*-
+
+obj-${build_pknock}      += libxt_pknock.so