fix #15215 (#17142)

* fix 15215

* fix test

* end line

* Update tests/stdlib/tnetconnect.nim

Co-authored-by: flywind <xzsflywind@gmail.com>

* Update lib/pure/net.nim

Co-authored-by: flywind <xzsflywind@gmail.com>
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>

tests/stdlib/tnetconnect.nim

@@ -0,0 +1,22 @@
+discard """
+  cmd: "nim c -r -d:ssl $file"
+  exitcode: 0
+"""
+
+import std/net
+
+# Issue 15215 - https://github.com/nim-lang/Nim/issues/15215
+proc test() =
+  var
+    ctx = newContext()
+    socket = newSocket()
+
+  wrapSocket(ctx, socket)
+
+  connect(socket, "www.nim-lang.org", Port(443), 5000)
+
+  send(socket, "GET / HTTP/1.0\nHost: www.nim-lang.org\nConnection: close\n\n")
+
+  close(socket)
+
+test()