beta-5

• Last bits of UMB saga [fdkernel]
• A lot of work on object tracking [fdpp run-time]
• Extensions to allow passing env vars and boot drives to config.sys [boot]
• Fix problems with drive formatting [fdkernel]
• Add shared headers to most int vectors [fdkernel]
• New config.sys name: fdppconf.sys (fdconfig.sys supported for compatibility)
• Ported int2f/08 handling to fdpp framework
• Started work to pass int vectors back to the prev handler [fdkernel]
• Extend compiler front-end to allow compiling the original freedos
  sources with much fewer manual instrumentation [compile-time templates]
• Reviewed all diffs in fdkernel, compared with the original and reverted
  all changes that are no longer needed. Now our freedos code is much
  closer to the original than it ever was, and our front-end can parse
  it all properly.
• Lots of fixes