pgindent wishlist item

While Bruce is working on pgindent, let me register a small wishlist 
item. It would be quite useful to be able to supply extra typedefs on 
the command line to supplement a typedefs file downloaded from the 
buildfarm or constructed however. A concrete example: in the code I have 
been recently working on, there are typedefs for Jsonb and JsonbValue. 
If I run pgindent as normal on the new code these items are not treated 
properly. What I had to do was take a special copy of the typedefs list 
and add those two items. If we could pass a list of extra typedefs to 
supplement the typedefs file that would be very useful. Then I could do 
something like:
   pgindent --typedef Jsonb --typedef JsonbValue   src/backend/utils/adt/jsonfuncs.c

without having to mangle a typedefs file.

This would make using pgindent nicer to use during development, since 
any significant development is just about guaranteed to have some new 
typedefs the buildfarm can't have.

cheers

andrew