fix gcc warnings

Max Kellermann <max@duempel.org>
diff --git a/configure.ac b/configure.ac
index b90c4a7..9d51ef7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -37,7 +37,7 @@
 AM_CONDITIONAL([ENABLE_DEVEL], [test "$enable_devel" == "yes"])
 
 regular_CFLAGS="-D_LARGEFILE_SOURCE=1 -D_LARGE_FILES -D_FILE_OFFSET_BITS=64 \
-	-D_REENTRANT -Wall -Waggregate-return -Wmissing-declarations \
+	-D_REENTRANT -W -Wall -Waggregate-return -Wmissing-declarations \
 	-Wmissing-prototypes -Wredundant-decls -Wshadow -Wstrict-prototypes \
 	-Winline -pipe -DIPTABLES_VERSION=\\\"$PACKAGE_VERSION\\\" \
 	-DIPT_LIB_DIR=\\\"\${iptdir}\\\" -DIP6T_LIB_DIR=\\\"\${iptdir}\\\"";
@@ -46,7 +46,8 @@
 # Remove workarounds soon
 regular_CFLAGS="$regular_CFLAGS -Wno-aggregate-return \
 	-Wno-missing-declarations -Wno-missing-prototypes \
-	-Wno-redundant-decls -Wno-shadow -Wno-strict-prototypes -Wno-inline"
+        -Wno-unused-parameter \
+	-Wno-shadow -Wno-inline"
 
 AC_SUBST([regular_CFLAGS kinclude_CFLAGS])
 AC_SUBST([kbuilddir])