io.c: remove socket check

* io.c (nogvl_copy_stream_sendfile): remove socket check
  [ruby-core:59856][Feature #9427]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44747 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Jan 29 18:09:48 2014  Eric Wong <e@80x24.org>
+
+	* io.c (nogvl_copy_stream_sendfile): remove socket check
+	  [ruby-core:59856][Feature #9427]
+
 Wed Jan 29 04:29:54 2014  Aaron Patterson <aaron@tenderlovemaking.com>
 
 	* ext/openssl/ossl_ssl.c: pass read_nonblock options to underlying IO

io.c

@@ -10062,8 +10062,6 @@ nogvl_copy_stream_sendfile(struct copy_stream_struct *stp)
         stp->error_no = errno;
         return -1;
     }
-    if ((dst_stat.st_mode & S_IFMT) != S_IFSOCK)
-        return 0;
 
     src_offset = stp->src_offset;
     use_pread = src_offset != (off_t)-1;