change thread's status during blocking with select. fix #1425

spec/frozen/tags/macruby/library/socket/basicsocket/recv_tags.txt

@@ -1,3 +0,0 @@
-critical:BasicSocket#recv receives a specified number of bytes of a message from another socket
-critical:BasicSocket#recv accepts flags to specify unusual receiving behaviour
-critical:BasicSocket#recv gets lines delimited with a custom separator

spec/frozen/tags/macruby/library/socket/basicsocket/send_tags.txt

@@ -1,3 +0,0 @@
-critical:BasicSocket#send sends a message to another socket and returns the number of bytes sent
-critical:BasicSocket#send accepts flags to specify unusual sending behaviour
-critical:BasicSocket#send accepts a sockaddr as recipient address

spec/frozen/tags/macruby/library/socket/socket/connect_nonblock_tags.txt

@@ -1,2 +0,0 @@
-critical:Socket#connect_nonblock connects the socket to the remote side
-critical:Socket#connect_nonblock takes an encoded socket address and starts the connection to it

spec/frozen/tags/macruby/library/socket/tcpserver/accept_nonblock_tags.txt

@@ -1 +0,0 @@
-critical:Socket::TCPServer.accept_nonblock accepts non blocking connections

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

@@ -1,3 +1,2 @@
-critical:TCPServer#accept accepts a connection and returns a TCPSocket
 critical:TCPServer#accept can be interrupted by Thread#kill
 critical:TCPServer#accept can be interrupted by Thread#raise

spec/frozen/tags/macruby/library/socket/tcpsocket/new_tags.txt

@@ -1,2 +0,0 @@
-critical:TCPSocket.new connects to a listening server
-critical:TCPSocket.new has an address once it has connected to a listening server

spec/frozen/tags/macruby/library/socket/tcpsocket/open_tags.txt

@@ -1,2 +0,0 @@
-critical:TCPSocket.open connects to a listening server
-critical:TCPSocket.open has an address once it has connected to a listening server

thread.c

@@ -1082,10 +1082,14 @@ do_select(int n, fd_set *read, fd_set *write, fd_set *except,
   retry:
     lerrno = 0;
 
+    rb_vm_thread_t *thread = GetThreadPtr(rb_vm_current_thread());
+    rb_vm_thread_status_t prev_status = thread->status;
+    thread->status = THREAD_SLEEP;
     //BLOCKING_REGION({
 	result = select(n, read, write, except, timeout);
 	if (result < 0) lerrno = errno;
     //}, ubf_select, GET_THREAD());
+    thread->status = prev_status;
 
     errno = lerrno;