shrc: add adhoc fix for ansible on cygwin

ansible/hosts

@@ -1 +1 @@
-debian-vb ansible_ssh_host=192.168.2.103 ansible_ssh_user=yuk
+debian-vb

shrc

@@ -190,6 +190,13 @@ then
     export CHIT_PATH="$HOME/dbx/.chit"
 fi
 
+# adhoc fix for ansible on cygwin
+# http://blog.s-uni.net/2013/08/27/ansible-running-on-cygwin/
+if $incygwin
+then
+    export ANSIBLE_SSH_ARGS="-o ControlMaster=no"
+fi
+
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 # Zsh specific preferences