[RFC]: flex/lex update

hi

I noticed there is an update to lex/flex. The version in our tree
is ancient and there seems to be some updates (http://flex.sourceforge.net/)

Can someone comment on the state of lex in our tree? It's not considered
a contributed software (it resides in usr.bin) but it was taken from elsewhere.

what is our position? is it preferable for me to work on updating it or
just fixing the one bug I ran into?

thnx!

roman