bgp: remove uncommon open msg check

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
doc: Add tables about match and actions structures

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
ofctl_v1_0: Add remaining actions

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>