is defined.

for better timing resolution.

Don't hardcode function name.

tools log level defaults to "none", so that messages logged with LDAP_DEBUG_ANY show up by default; use "-d 0" to reset (addresses ITS#4044)

don't open pid/args files in one-shot mode (ITS#4152); bail out if files cannot be opened (port slapd's fix to ITS#4074)

with tls_opt_require_cert = TRY or DEMAND. Ignore requirements for clients.