support null-terminated arrays

[lunixbochs]

struc:"nullterm"?

(and strings, by extension)

[eggsampler]

This would be incredibly useful where strings aren't encoded with a fixed length, but are variable length with some sort of delimeter character(s). Something like the following might work for single null terminated strings, as well as other delimeters such as \r\n

struc:"delim='\x0D\x0A'"