rpcd: add 802.11ac for iwinfo

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43005 3c298f89-4303-0410-b956-a3cf2f4a3e73
base-files: fix telnet login on musl

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43006 3c298f89-4303-0410-b956-a3cf2f4a3e73