- Various spelling fixes.

- Various spelling fixes.
- Sec "Developer Database": added a sentence about finger
  login@debian.org.
- Update the total number of packages and the example directory tree
  of a Debian archive.
- Updated the list of available architectures.
- Commented out the "Subsections" section since it will RSN have nothing
  to with the Debian archive. It's just a generic information field
  of the package and nothing more.
- Added more incentive to use experimental since it doesn't cause
  any pains to the ftpmasters.
- Sec "When to do a source NMU": updated the NMU "protocol" and suggest
  the use of the delayed queue.
- New Section "Acknowledging the NMUs" to explain the need to integrate
  the changes introduced by NMUs. Insists on the fact that one shouldn't
  be upset by a NMU.
- Stubbed in new Section "Collaborative maintenance".
- Stubbed in new Section "The Package Tracking System".

git-svn-id: svn://anonscm.debian.org/ddp/manuals/trunk/developers-reference@1675 313b444b-1b9f-4f58-a734-7bb04f332e8d