So version.c files only need to be generated once.

must destroy existing indexes and run slapindex to regenerate.

of outstanding requests on a connection. Set rate limits for request
execution:
   no connection can have more than maxthreads/2 ops executing at once.
   a connection that is write-blocked will not execute any new ops.
   queued ops must drain before any new ops can execute.
If the queue exceeds the max_pending limit, the connection is closed.
...also fixed a bug where a connection was not marked active if it never
received a Bind.

Replaced with bi_entry_get_rw.
Implemented for back-bdb, back-ldbm, back-ldap.

and the lock goes away after txn_commit. Not sure what to do about the
cache if txn_commit actually fails though. Since txn_prepare succeeded,
should never happen. ???

needs to be integrated into the MSVC build system.

fix this if ACLs are expected to work on the local slapd.