gnucash maint: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/72982de5 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/8b5dd55d (commit)
	from  https://github.com/Gnucash/gnucash/commit/b67bf4b7 (commit)



commit 72982de588f5a495c7a927cf02d8d3347d890fe4
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Nov 22 21:56:42 2020 +0800

    Revert "[date-utilities] Convert reldate list into srfi-9 records"
    
    This reverts commit 3be79359651eea57d417d57eaec97976f0b3fbbe.

commit 8b5dd55dc4248f8dcf43f65d582549f23ee12a44
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Sun Nov 22 21:56:35 2020 +0800

    Revert "[c-interface] deprecate gnc:make-string-database"
    
    This reverts commit b67bf4b761b3d73c32c3e6662c6626e30ff5e2cb.



Summary of changes:
 libgnucash/app-utils/c-interface.scm    |   2 -
 libgnucash/app-utils/date-utilities.scm | 508 ++++++++++++++++++++++----------
 2 files changed, 348 insertions(+), 162 deletions(-)