* ext/socket/socket.c (sock_connect_nonblock): do not raise EISCONN
[ruby-core:68926] [Feature #11072]
* test/socket/test_nonblock.rb: check non-EISCONN on 2nd connect
This is to reduce exceptions for code which issues a
(IMHO, unnecessary) second connect() syscall.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50347 b2dd03c8-39d4-4d8f-98ff-823fe69b080e