API: pass *SearchIndex() length of key (0 will use strlen(key)).

API: pass *SearchIndex() length of key (0 will use strlen(key)).
API: remove rpmdb{First,Next}RecNum routines.
db3.c: remove cursor DB_RMW implementation, something else is needed.
rpmdb.c: first crack at rpmdb match iterator.
query.c: ditto.
rebuilddb.c: ditto.
dumpdb.c: ditto.

CVS patchset: 3668
CVS date: 2000/04/12 13:42:57