[m-users.] Enable LCMC tail recursion optimization by default?

[Peter Wang]

On Wed, 20 Apr 2016 11:06:01 +0200, Dirk Ziegemeyer <dirk at ziegemeyer.de> wrote:
> 3. LCMC option might help but doesn’t seem to be activated for the library/list module. (see mercury/library/Mercury.options)

--optimize-constructor-last-call is set in library/LIB_FLAGS

(There is probably a reason we have both Mercury.options and --flags.
I don't know why.)

Peter