Add Errno::EADDRNOTAVAIL to system call errors

Author: spk

lib/redis/client.rb

@@ -341,6 +341,7 @@ def establish_connection
       @pending_reads = 0
     rescue TimeoutError,
            SocketError,
+           Errno::EADDRNOTAVAIL,
            Errno::ECONNREFUSED,
            Errno::EHOSTDOWN,
            Errno::EHOSTUNREACH,