Add tags for new failing specs

Author: eregon

spec/tags/library/socket/tcpserver/accept_tags.txt

@@ -0,0 +1,4 @@
+fails:TCPServer#accept using IPv4 with a connected client returns a TCPSocket which is set to nonblocking
+fails:TCPServer#accept using IPv4 with a connected client returns a TCPSocket which is set to close on exec
+fails:TCPServer#accept using IPv6 with a connected client returns a TCPSocket which is set to nonblocking
+fails:TCPServer#accept using IPv6 with a connected client returns a TCPSocket which is set to close on exec

spec/tags/library/socket/tcpsocket/initialize_tags.txt

@@ -2,3 +2,7 @@ fails:TCPSocket#initialize raises Errno::ETIMEDOUT with :connect_timeout when no
 fails:TCPSocket#initialize with a running server connects to a server when passed connect_timeout argument
 fails:TCPSocket#initialize raises IO::TimeoutError with :connect_timeout when no server is listening on the given address
 fails:TCPSocket#initialize with a running server does not use the given block and warns to use TCPSocket::open
+fails:TCPSocket#initialize using IPv4 when a server is listening on the given address creates a socket which is set to nonblocking
+fails:TCPSocket#initialize using IPv4 when a server is listening on the given address creates a socket which is set to close on exec
+fails:TCPSocket#initialize using IPv6 when a server is listening on the given address creates a socket which is set to nonblocking
+fails:TCPSocket#initialize using IPv6 when a server is listening on the given address creates a socket which is set to close on exec

spec/tags/library/socket/udpsocket/initialize_tags.txt

@@ -0,0 +1,2 @@
+fails:UDPSocket#initialize sets the socket to nonblock
+fails:UDPSocket#initialize sets the socket to close on exec

spec/tags/library/socket/unixserver/accept_tags.txt

@@ -0,0 +1,2 @@
+fails:UNIXServer#accept with a client with data available the returned UNIXSocket is set to nonblocking
+fails:UNIXServer#accept with a client with data available the returned UNIXSocket is set to close on exec

spec/tags/library/socket/unixsocket/initialize_tags.txt

@@ -0,0 +1,2 @@
+fails:UNIXSocket#initialize using an existing socket path sets the socket to nonblock
+fails:UNIXSocket#initialize using an existing socket path sets the socket to close on exec