gnucash maint: Change the document link KVP symbol to original name

[Robert Fewell]

Updated	 via  https://github.com/Gnucash/gnucash/commit/7c102678 (commit)
	from  https://github.com/Gnucash/gnucash/commit/63ec05d0 (commit)



commit 7c1026783be72f336cedc33a6b6e7415f2b99b7b
Author: Robert Fewell <14uBobIT at gmail.com>
Date:   Sun Sep 13 10:56:17 2020 +0100

    Change the document link KVP symbol to original name
    
    To maintain compatibility with any existing document link entries the
    old 'assoc-head' and 'asooc_uri' entries will be used for the gsetting
    and KVP entries.



Summary of changes:
 gnucash/gnome-utils/dialog-doclink-utils.c  | 11 +++++++----
 gnucash/gschemas/org.gnucash.gschema.xml.in |  2 +-
 libgnucash/engine/Transaction.c             |  2 +-
 libgnucash/engine/gncInvoice.c              |  2 +-
 4 files changed, 10 insertions(+), 7 deletions(-)