Conflicts:
	drivers/cvc4_bare.drv

since it is not interpreted as infinite by CVC4

As a side effect, this puts symbolic links back inside the archive. They
had been lost since 0.82 and prevented the use of a local installation.

It is now done by a different mechanism than parsing of time:
timeregexp is not any more used for parsing of steps, stepsregexp is
used instead.

Conflicts:
	drivers/cvc4_bare.drv
	drivers/smt-libv2.drv
	examples/logic/lagrange_inequality/why3session.xml
	examples/logic/triangle_inequality/why3session.xml

- Switch from AUFNIRA to AUFBVNIRA logic in cvc4_bare

This commit also removes the laziness for accessing symbols, since they
are already in the scope at the time the plugin is loaded.

Temporary trick to enforce encoding in presence of algebraic types,
even if they are not polymorphic

probably not efficient because not memoized (Claude needs help for that)