TCP/TLS connection pooling for Eio

tweaks

-3
-3
lib/conpool.mli
··· 89 89 'a 90 90 (** Acquire connection, use it, automatically release back to pool. 91 91 92 - This is the only way to use connections from the pool. All resource management 93 - is handled automatically through Eio's switch mechanism. 94 - 95 92 If idle connection available and healthy: 96 93 - Reuse from pool (validates health first) 97 94 Else: