The "default" tech database flags indicate whether entries are in the tech room by default, that is when the table is originally parsed and the campaign is started. Flags may be changed later, so that when the tech database is "reset to default" the flags can be returned to the known state as specified in the tables.
A bug was introduced back in commit c924e3997a (!) based on a misinterpretation of what "default" meant. This fixes the bug and clarifies the flags.
Fixes#4390.
1) Upgrade the pilot file code to correctly save flags whether entries are added *or* removed
2) Make the tech-db/tech-db-multi ship flag handling consistent
3) Add scripting support for intel entries
4) Add scripting support for adding and removing entries from the tech room
5) Minor cleanup
Add modular help tables and allow more than 2 help overlays
git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10739 387891d4-d844-0410-90c0-e4c51a9137d3
Mike Nelson