* src/keydb.c
** Make the code reentrant and much simpler. Remove all overhead.
** Rethink the keydb_search_reset concept and use a cache or
   something similar to speed up operations.

* src/stream.c
** Make the walk_xxx functions easier.
** If an error occure in the filter, it is executed twice.

* src/trustb.c
** I'm not really sure if we should include something which is only
   GPG specific. But this way we don't need to implement trust calculation.

* src/new-packet.c
** Find a way to make sure the copy of a secret key is also stored
   in secure memory. (We currently solve this with cloning)

* add more doc headers for the external interface.

* grep the code for all 'fixme/todo's and replace them with real code.

* add ldap keyserver support (not important at all!)


