gnucash-docs master: Multiple changes pushed

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/2204100e (commit)
	 via  https://github.com/Gnucash/gnucash-docs/commit/9edbf251 (commit)
	 via  https://github.com/Gnucash/gnucash-docs/commit/4b8578b8 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/25859213 (commit)



commit 2204100e26f8c2b482bf48feeec6a36479db9619
Merge: 2585921 9edbf25
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Sat Mar 7 09:58:04 2020 +0100

    Merge branch 'maint'

commit 9edbf2513c5d762be952e276d885f49aae57fa57
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Sat Mar 7 07:36:09 2020 +0100

    Guide: Hotfix of appendix A
    
    Replace empty pages by links;
    Replace "See .." by xrefs;
    Link contributed XSLTs
    
    New ENTITYs url-wiki-qif, url-wiki-xslt
    
    Thread: https://lists.gnucash.org/pipermail/gnucash-user/2020-March/089623.html

commit 4b8578b84101a993fe8947c58013926308cabfef
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri Jan 17 16:14:07 2020 +0100

    Fix comment



Summary of changes:
 cmake/AddPdfTarget.cmake |   2 +-
 docbook/gnc-docbookx.dtd |   4 +-
 guide/C/appendixa.xml    | 144 ++++++++++++++++++++++++++++++-----------------
 3 files changed, 95 insertions(+), 55 deletions(-)