* caddy adapt for listen_protocols
* adapt listen_socket
* allow multiple listen sockets for port ranges and readd socket fd listen logic
* readd logic to start servers according to listener protocols
* gofmt
* adapt caddytest
* gosec
* fmt and rename listen to listenWithSocket
* fmt and rename listen to listenWithSocket
* more consistent error msg
* non unix listenReusableWithSocketFile
* remove unused func
* doc comment typo
* nonosec
* commit
* doc comments
* more doc comments
* comment was misleading, cardinality did not change
* addressesWithProtocols
* update test
* fd/ and fdgram/
* rm addr
* actually write...
* i guess we doin' "skip": now
* wrong var in placeholder
* wrong var in placeholder II
* update param name in comment
* dont save nil file pointers
* windows
* key -> parsedKey
* osx
* multiple default_bind with protocols
* check for h1 and h2 listener netw
* reverseproxy: do not parse upstream address too early if it contains replaceble parts
* remove unused method
* cleanup
* accommodate partially replaceable port
* added some tests for parseUpstreamDialAddress
Test 4 fails because it produces "[[::1]]:80" instead of "[::1]:80"
* support absolute windows path in unix reverse proxy address
* make IsUnixNetwork public, support +h2c and reuse it
* add new tests
