Fix generateEffectiveTLDs.php for MPL 2.0 licence block.

Got one small additional fix for you on top of the changes you already merged.  I don't know why Github thinks it needs to list all the commits since ratelle's original fork again -- the only new changes are the very last two, which make `generateEffectiveTlds.php` understand the new MPL 2.0 licence block that the upstream effective_tld_names.dat has now, thus removing a whole bunch of junk comments from the generated effectiveTlds files.  (The "Files Changed"  tab doesn't have anything extraneous, though.)

I'll have another, more substantial set of changes for you probably next week, but this seemed like it wanted fixing now.