An example how to make asynchronous DNS host name resolution.

Revision:
0:d0f7d306a900
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri May 25 12:25:32 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#c26126ee5951b70703989c844c4d0bc8f498049b