owipcalc: import from base

This is a helpful utility, but it does not have any dependencies
in base repository. Move it to packages feed.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

net/owipcalc/Makefile

@@ -0,0 +1,44 @@
+#
+# Copyright (C) 2012 Jo-Philipp Wich <jo@mein.io>
+#
+# This is free software, licensed under the Apache 2 license.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=owipcalc
+PKG_RELEASE:=5
+PKG_LICENSE:=Apache-2.0
+
+include $(INCLUDE_DIR)/package.mk
+
+
+define Package/owipcalc
+  SECTION:=utils
+  CATEGORY:=Utilities
+  TITLE:=Simple IPv4/IPv6 address calculator
+  MAINTAINER:=Jo-Philipp Wich <jo@mein.io>
+endef
+
+define Package/owipcalc/description
+  The owipcalc utility supports a number of calculations and tests to work
+  with ip-address ranges, this is useful for scripts that e.g. need to
+  partition ipv6-prefixes into small subnets or to calculate address ranges
+  for dhcp pools.
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+	$(TARGET_CC) $(TARGET_CFLAGS) \
+		-o $(PKG_BUILD_DIR)/owipcalc $(PKG_BUILD_DIR)/owipcalc.c
+endef
+
+
+define Package/owipcalc/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/owipcalc $(1)/usr/bin/owipcalc
+endef
+
+$(eval $(call BuildPackage,owipcalc))