README.md: updated. fix titles
Miniupnpd nftables support by Tomofumi Hayashi (s1061123@gmail.com).
-##Current Status
-nftables support is 'alpha' version, not "so much" stable.
-
## Supported Features
- IPv4 NAT/Filter add/del.
## How to build miniupnpd with nftables:
-Run 'make' command with 'Makefile.linux_nft',
+Run 'configure' command with '--firewall=nftables',
-`make -f Makefile.linux_nft`
+`./configure --firewall=nftables && make`
## How to Run
Please run 'netfilter_nft/scripts/nft_init.sh' to add miniupnpd chain.
