Read additional configuration information from the given file before
continuing with the next line of the current file.
.TP
-.B index <attribute>
-See the man page for the specific backend you are using for more
-information about the index directive, for example
-.BR slapd-bdb (5)
-.TP
.B index_intlen <integer>
Specify the key length for ordered integer indices. The most significant
bytes of the binary integer will be used for index keys. The default