Function parse_server_address 

pub fn parse_server_address(address: &str) -> (String, Option<u16>)

Parse a server address string into (host, port) components.

Handles various address formats:

• IP:Port (e.g., “127.0.0.1:4433”)
• IP alone (e.g., “127.0.0.1”)
• hostname:port (e.g., “test.hessra.net:443”)
• hostname alone (e.g., “test.hessra.net”)
• IPv6 with brackets and port (e.g., “[::1]:443”)
• IPv6 with brackets, no port (e.g., “[::1]”)
• URLs with protocol (e.g., “https://host:port/path”)

Returns (host, Option) where host is just the hostname/IP part without any embedded port or protocol.