Improve solana-wallet network arguments

[mvines]

solana-wallet network arguments are clunky and don't even support DNS or TLS.

        --drone-host <IP ADDRESS>    Drone host to use [default: same as --host]
        --drone-port <PORT>          Drone port to use [default: 9900]
    -n, --host <IP ADDRESS>          Host to use for both RPC and drone [default: 127.0.0.1]
        --rpc-host <IP ADDRESS>      RPC host to use [default: same as --host]
        --rpc-port <PORT>            RPC port to use [default: 8899]

Let's turn the the --rpc-host and --rpc-port arguments into something like the solana-install's json_rpc_url argument.

Then turn --drone-host/--drone-port into a single --drone argument that accepts an IP address or DNS name followed by an optional port.