Allow multiple domains to share the same backend pool using share_with parameter.
This saves pool slots when domains point to the same servers.
- Add share_with parameter to haproxy_add_domain
- Add helper functions for shared domain management
- Protect shared pools from being cleared on domain removal
- Update documentation with pool sharing examples
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Split domain routing into two stages for improved performance:
- Stage 1: map_str for exact domains (O(log n) using ebtree)
- Stage 2: map_dom for wildcards only (O(n) but small set)
Wildcards now stored in separate wildcards.map file.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>