proposal - using names as primary names of plpgsql function parameters instead $ based names

Hi

Now, I when I working on plpgsql_check, I have to check function
parameters. I can use fn_vargargnos and out_param_varno for list of
arguments and related varno(s). when I detect some issue, I am using
refname. It is not too nice now, because these refnames are $ based. Long
names are alias only. There are not a possibility to find related alias.

So, my proposal. Now, we can use names as refname of parameter variable. $
based name can be used as alias. From user perspective there are not any
change.

Comments, notes?

Regards

Pavel