base-files: add network_get_protocol() to /lib/functions/network.sh

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39099 3c298f89-4303-0410-b956-a3cf2f4a3e73
base-files: ipcalc.sh: support bit length as netmask parameter

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@39100 3c298f89-4303-0410-b956-a3cf2f4a3e73