[Serusers] using subst function from textops module

[Anthony Chapellier]

Hi,

I wish to use subst function and looked into module textops 
documentation to know how to use it.

The documentation provides an example which is using a variable or flag 
named \u. Looks like this '\u' is a replacement for the current uri of 
the SIP request.

# replace the uri in to: with the message uri (just an example)
if ( subst('/^To:(.*)sip:[^@]*@[a-zA-Z0-9.]+(.*)$/t:\1\u\2/ig') ) {};

So, I would like to know if there are more variables like this one that 
can be used with subst ?

And are there variables too for log function that can be used the same way ?

Thanks,