gnucash maint: Replace gitlog2ul.sh with git-release-notes.pl.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/58069668 (commit)
	from  https://github.com/Gnucash/gnucash/commit/72bdaeef (commit)



commit 580696681a3840565012259f57dff9491e28f16a
Author: John Ralls <jralls at ceridwen.us>
Date:   Thu Jun 27 16:43:43 2019 -0700

    Replace gitlog2ul.sh with git-release-notes.pl.
    
    git-release-notes.pl finds the last release on its own and formats
    the log output separately as text for NEWS and HTML for the announcements.



Summary of changes:
 util/git-release-notes.pl | 96 +++++++++++++++++++++++++++++++++++++++++++++++
 util/gitlog2ul.sh         | 55 ---------------------------
 2 files changed, 96 insertions(+), 55 deletions(-)
 create mode 100644 util/git-release-notes.pl
 delete mode 100755 util/gitlog2ul.sh