Hi,

I have decided that, instead of queuing all my patches here while 
waiting for the current ones to go through, I shall post them all now. 
Hopefully the low hanging fruit will then get done and only the most 
controversial ones will remain when I go away for Christmas.

The attached patch adds a new CLI command named 'init-if-undefined'.

This is essentially the same a 'set variable' (for convenience variables 
only), but does not set the variable if it already has a value.

It is useful in scripts whose values can be overridden, or as an 
approximation of a statically initialised variable.

Andrew Stubbs