cherry-pick more Linux compat fixes
cherry-pick the new rump_wmd utility
update URLs for github rumpkernel org
Source for buildrump.sh git rev f3255e301d4ca8b54d2b1a41ff3b21b9c1000819
Source for buildrump.sh git rev 12b417b0810da4ee843e5022c778d19b49c87701