Change Details

Change `CNode` to use a pointer to `Sock` instead of a bare `SOCKET`. This will help mocking / testing / fuzzing more code. Rename `CNode::cs_hSocket` to `CNode::m_sock_mutex` This is a partial backport of [[https://github.com/bitcoin/bitcoin/pull/23604 | core#23604]] https://github.com/bitcoin/bitcoin/pull/23604/commits/c5dd72e146dd8fa77d29c8689a42322a4d1ec780 https://github.com/bitcoin/bitcoin/pull/23604/commits/c41a1162ac4da437c5d755e8fe2bf636bed22b0f https://github.com/bitcoin/bitcoin/pull/23604/commits/b68349164827f14c472201cad54c4e19a3321261 We also need to split the FuzzedSock interface and implementation (https://github.com/bitcoin/bitcoin/pull/21630/commits/29ae1c13a59187119f5b2a38b54dbbec936d8f87) to "make move FuzzedSock earlier in src/test/fuzz/util.h" work. Depends on D17130