gnucash-docs maint: Update several URLs in configure.ac

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/3e37c1a0 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/03019110 (commit)



commit 3e37c1a065ce7a4776d57e63f53d3ce3291dd62c
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Fri Oct 12 07:24:24 2018 +0200

    Update several URLs in configure.ac
    
    BugURL, some http->https



Summary of changes:
 configure.ac | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)