#1 Add support of $ in identifiers and filenames

[Anonymous]

On OpenVMS it is common to have $ in names including
function names and filenames.

Currently, in C Gonzui treats $ as separator.

I tried adding $ as valid character in an identfier in
the langscan/c/ctol.l lex file but that triggers
asserts in the dbm module. I'm unsure whether this is a
limitation of Berkeley DB.

Can support be added?

For you reference: exuberant ctags also supports it.