Connection Redirection Mechanism implementation

_emphasized text_The goal is to implement proxy redirection protocol describe in MDEV-15935 :
Connection process would ends with OK_Packet that may indicate redirection mechanism with the format
"Location: mysql://<host>:<port>/key=value&key2=value2" in `info` field.

Connector, if having an option that permits redirection, must then redirect to the indicated location and close initial socket.

A successful redirection will be cached for some time (next 10 minutes). If some following connection establishment use a cache location and fail to connect, the connector will then try to reconnect to initial host silently.