Implementation no longer uses strtok_r(), it may be broken
or have an odd prototype.
Update configure not to check for strtok/strtok_r nor require
strtok_r to LDAP_API_FEATURE_X_OPENLDAP_REENTRANT.

when symbol being replaced was defined as a macro.

* Fixed unfree'd 'char *results' in all tcl_* functions (only unfree'd in
  certain cases, moved the free to the actual function) so no more mem
  leaks. Tested this with over 500,000 access's for testing :)
* Miscellaneous source style and tabulation fixes

Slight adaption of concurrency-test to enable even more writers/readers.

  correctness of locking schemas in backends.
In back-bdb2 open NEXTID during startup and close at shutdown.

slapd server timing via a new slapd command line option '-t'.

Fix of a back-bdb2 --> back-ldbm leakage (==> new bdb2-specific DB file suffix).