Fix network connect poll interuption handling

When connecting to socket, it is possible to get EINTR. In such case,
there should be an another attempt to connect if we are not over the
timeout. The timeout should be adjusted accordingly in that case.

This fixes phpredis/phpredis#1881

Closes phpGH-16606

Author: bukka

NEWS

@@ -63,6 +63,9 @@ PHP                                                                        NEWS
   . Fixed bug GH-16905 (Internal iterator functions can't handle UNDEF
     properties). (nielsdos)
 
+- Streams:
+  . Fixed network connect poll interuption handling. (Jakub Zelenka)
+
 - Windows:
   . Fixed bug GH-16849 (Error dialog causes process to hang). (cmb)