* Samba-Panza immediately calls for disarmament
* 'Anti-balaka' militia spokesman welcomes choice
* EU foreign ministers agree to send up to 1,000 troops
(Adds French reaction, quotes, details)
By Paul-Marin Ngoupana
BANGUI, Jan 20 (Reuters) - Central African Republic lawmakers chose their capital's mayor, Catherine Samba-Panza, to become interim president on Monday and lead the ...