Add prototypes, void in util/ego/share

Add prototypes, void in util/ego/share

This uncovers a problem in il/il_aux.c: it passes 3 arguments to
getlines(), but the function expects 4 arguments.  I add FALSE as the
4th argument.  TRUE would fill in the list of mesregs.  IL uses
mesregs during phase 1, but this call to getlines() is in phase 2.
TRUE would leak memory unless I added a call to Ldeleteset(mesregs).
So I pass FALSE.

Functions passed to go() now have a `void *` parameter because
no_action() now takes a `void *`.