Changes:
- 9f820de Bump to version 26.1
- 9e636b4 buildlib: Build devel stable branches on Azure
- 047cb20 man: Fix return value for ibv_reg_dm_mr
- 497706f build: Update ABI files
- 0f52016 build: Run CI builds on the stable branches with azp support
- 6ce72aa buildlib: Remove travis CI
- 3146dd6 cxgb4: always query device before initializing chip version
- 37079bb cxgb4: free appropriate pointer in error case
- 981c755 mlx5: Allow insertion of duplicate rules using DR API
- 5639fce verbs: Set missing errno in ibv_cmd_reg_mr