Note that I forgot to account for the possibility of freezing code and
environment. As such, the freeze and thaw opcodes have the following
variant:
freeze Sx, Py, Iz
thaw Py, Sx, Iz
where Z is the freeze/thaw level. O (the default) is the PMC only, 1
includes the global/class data for the PMC, and 2 includes the code for
the packages for the PMC, pruned for accessibility.
Also note that if teh PMC being frozen is a closure or continuation, then
all lexical and global data to reinstantiate the PMC (including
potentially code) will be frozen at level 0.
Dan
