gnucash maint: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/137c920d (commit)
	 via  https://github.com/Gnucash/gnucash/commit/a65dd6cc (commit)
	 via  https://github.com/Gnucash/gnucash/commit/2b692786 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/0e37e059 (commit)
	from  https://github.com/Gnucash/gnucash/commit/7a13398e (commit)



commit 137c920d060d197d6a845b1a3cf5a88d8987d3f6
Merge: a65dd6c 2b69278
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Jan 4 15:50:39 2019 -0800

    Merge Chris Carson's 'dateFormat' into maint.

commit a65dd6cc253ec3f4da21074cfe8b8443b4d2d64f
Merge: 7a13398 0e37e05
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Jan 4 15:49:42 2019 -0800

    Merge Chris Carson's 'refactor-Scrub-c' into maint.

commit 2b69278650f55b8ceed4eef9f4268a60138045a0
Author: Christopher D. Carson <chriscarson60187 at gmail.com>
Date:   Tue Jan 1 06:20:23 2019 -0600

    Re-coded for cached locale.
    
    Testing notes:  Based on the averages of 3 runs, the net
    user CPU to save the XML file I use is:
    10.2 seconds without this change
    7.6 seconds with this change
    
    In my environment the first call to the format routine
    in question, the call that sets the cache value, is at
    the end of the XML load.

commit 0e37e059d504d9e2ab2ececd0979ec87a93fea1e
Author: Christopher D. Carson <chriscarson60187 at gmail.com>
Date:   Sat Dec 29 06:45:47 2018 -0600

    Fix XML load CPU hotspot: Scrub.c xaccTransScrubPostedDate
    
    The refactoring provides roughly 10% reduction in user CPU
    use for XML file load by moving an expensive function
    to within an if-clause where the result is used.  The diff looks
    like a full re-write but only the if statements, indenting,
    and commentary changed.



Summary of changes:
 libgnucash/engine/Scrub.c          | 14 ++++++++------
 libgnucash/engine/gnc-datetime.cpp | 12 +++++++++++-
 2 files changed, 19 insertions(+), 7 deletions(-)