Updated two maps: DIONYSUS and PLUTO

Minor changes:
DIONYSUS: removed that hill with the MISS again.
PLUTO: removed two ore drills/patches on each starting island.
Make the RA superweapon descriptions a bit more consistent
Add build limits to iron and pdox
Move ra superweapons a little closer to the ra1 superweapons by removing bibs and changing the footprint of iron to 2,1
Apply offset to iron so it graphically fits on its footprint properly
Give the airdrop C17 enough room to land. Fixes #3554.
Fix ProductionAirdrop style nits.
Restore packet size restriction with 128k limit.
Fix cached paths in PathFinder. Fixes #3557.
Merge pull request #3560 from ScottNZ/superweapons

RA superweapon improvements
Merge pull request #3559 from wuschel/bleed

Updated two maps: DIONYSUS and PLUTO
Merge pull request #3561 from pchote/more-playtest-fixes

More playtest regression fixes.
Make ra hosp reveal shroud
Merge pull request #3563 from ScottNZ/hosp

Make ra hosp reveal shroud