ABIDJAN/OUAGADOUGOU, Feb 20 (Reuters) - France's defence minister pledged on Monday to boost military support to Ivory Coast, as Paris adjusts its strategy in West Africa after neighbouring Burkina Faso ordered French troops to leave and vowed to curb a worsening Islamist insurgency solo. During an official visit to the Ivorian commercial capital Abidjan, the French minister, Sebastien Lecornu, declined to comment on Burkina Faso's decision even as he re-emphasised France's commitment to engagement with security issues in West Africa, where the Islamist insurgency is spreading. See here for a complete list of exchanges and delays