Update config.guess and config.sub from official upstream project at https://savannah.gnu.org/projects/config/

Specifically in this case, commit 5256817ace8493502ec88501a19e4051c2e220b0 for the date Wed Jan 1 19:36:58 2020 +1100

Ryan Tandy authored Dec 19, 2019 and Quanah Gibson-Mount committed Jan 09, 2020

This reverts commits a956f759 ("Add (not
yet used) ICU detection") and 1cf5838e
("detect ICU and link it into slapd(8)").

Douglas Royds authored Nov 19, 2018 and Quanah Gibson-Mount committed Nov 19, 2018

When attempting a reproducible build, replace the WHOWHERE value with something
fixed, "openldap". If you're not trying to do a reproducible build,
SOURCE_DATE_EPOCH won't be set, so the existing WHOWHERE string will apply.
See https://reproducible-builds.org/specs/source-date-epoch/

Jan Synacek authored Feb 11, 2015 and Quanah Gibson-Mount committed Feb 11, 2015

The old cpp version generated:
__db_version 5

The new output:
__db_version
            5

Running cpp with -P (inhibit linemarkers generation) fixes this when using gcc 5.
Behavior with older versions of gcc is not changed.

Drop support for BDB 6.0.20 and later, incompatible license