replacing server & client sockets with socket_holder containing ipv4 & ipv6 sockets

[armandgray]

Functionality:

1. Server & Client can specify any valid address and netcode_client/server_create_internal will create both 1 ipv4 & 1 ipv6 sockets. Client & Server dynamically select correct socket.

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Change Log:

1. netcode_client/server_create_overload allows binding of 1 ipv4 & 1 ipv6 socket based on passed address.
2. Any client/ server socket interactions are flagged against the to or from address to dynamically select the socket matching the address protocol.
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3. netcode_client_t socket was encapsulated in netcode_socket_holder_t <- contains 2 sockets
4. netcode_socket_create -> netcode_socket_create_internal (renamed)

• new test suite (4 cases): test_client_create
• new test suite (4 cases): test_server_create
• new test suite (4 cases): test_client_server_ipv4_socket_connect
• new test suite (4 cases): test_client_server_ipv6_socket_connect
• valgrind passing

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Internal Functionality Tests:

1. Tested all cases on Android against remote Server (client only) & local running new server.
2. Tested a., c. & e. on iOS sim against GS. iOS sim was unable to reach my home router w/ ipv6.

Cases:
a. ipv4 client <-> ipv4 address <-> ipv4 server
b. ipv6 client <-> ipv6 address <-> ipv6 server
c. ipv4/6 client <-> ipv4 address <-> ipv4/6 server
d. ipv4/6 client <-> ipv6 address <-> ipv6 server
e. ipv4/6 client <-> ipv4 address <-> ipv4 server
f. ipv6 client <-> ipv6 address <-> ipv4/6 server

[gafferongames]

This looks awesome, but can you debug why the test is crashing?