ITS#1749 added "debug" description, commented out because it has no effect

without NEW_LOGGING. Added logfile.

doc/man/man5/slapd.conf.5

@@ -126,6 +126,62 @@ SubstringAssertion NISnetgrouptriple Bootparameter
 .B concurrency <integer>
 Specify a desired level of concurrency.  Provided to the underlying
 thread system as a hint.  The default is not to provide any hint.
+.\".TP
+.\".B debug <subsys> <level>
+.\"Specify a logging level for a particular subsystem.  The subsystems include
+.\".B global
+.\"a global level for all subsystems,
+.\".B acl
+.\"the ACL engine,
+.\".B backend
+.\"the backend databases,
+.\".B cache
+.\"the entry cache manager,
+.\".B config
+.\"the config file reader,
+.\".B connection
+.\"the connection manager,
+.\".B cyrus
+.\"the Cyrus SASL library interface,
+.\".B filter
+.\"the search filter processor,
+.\".B getdn
+.\"the DN normalization library,
+.\".B index
+.\"the database indexer,
+.\".B liblber
+.\"the ASN.1 BER library,
+.\".B module
+.\"the dynamic module loader,
+.\".B operation
+.\"the LDAP operation processors,
+.\".B sasl
+.\"the SASL authentication subsystem,
+.\".B schema
+.\"the schema processor, and
+.\".B tls
+.\"the TLS library interface. This is not an exhaustive list; there are many
+.\"other subsystems and more are added over time.
+.\"
+.\"The levels are, in order of decreasing priority:
+.\".B emergency, alert, critical, error, warning, notice, information, entry,
+.\".B args, results, detail1, detail2
+.\"An integer may be used instead, with 0 corresponding to
+.\".B emergency
+.\"up to 11 for
+.\".BR detail2 .
+.\"The
+.\".B entry
+.\"level logs function entry points,
+.\".B args
+.\"adds function call parameters, and
+.\".B results
+.\"adds the function results to the logs.
+.\"The
+.\".B detail1
+.\"and
+.\".B detail2
+.\"levels add even more low level detail from individual functions.
 .TP
 .B defaultsearchbase <dn>
 Specify a default search base to use when client submits a
@@ -279,6 +335,11 @@ no limit is set on
 .BR unchecked .
 .RE
 .TP
+.B logfile <filename>
+Specify a file for recording debug log messages. By default these messages
+only go to stderr and are not recorded anywhere else. Specifying a logfile
+copies messages to both stderr and the logfile.
+.TP
 .B loglevel <integer>
 Specify the level at which debugging statements and operation 
 statistics should be syslogged (currently logged to the