gnucash maint: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/74cbde2d (commit)
	 via  https://github.com/Gnucash/gnucash/commit/174752e2 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/8b1b25ae (commit)
	from  https://github.com/Gnucash/gnucash/commit/aa086893 (commit)



commit 74cbde2d4f8822c330e0eb75777d3e6c1758a58b
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon May 28 08:56:01 2018 -0700

    normalize date formats the C++ way.

commit 174752e28c83787eeb15f0ccfc77f60b7a3087f4
Merge: aa08689 8b1b25a
Author: John Ralls <jralls at ceridwen.us>
Date:   Sat May 26 18:10:02 2018 -0700

    Merge Bill Nottingham's 'bad-dates' into maint

commit 8b1b25aee52d3c844a4cbecba7c80b3cd5d8627b
Author: Bill Nottingham <notting at splat.cc>
Date:   Tue May 22 23:37:22 2018 -0400

    Modify date formatters to strip out certian specifiers.
    
    strptime/strftime supports various modifiers to their parameters.
    
     'E' and 'O': alternate locale-specific formats
     (used in default format for Persian, Oriya, Azerbaijani)
     '-': padding
     (used in default format for Czech)
    
    GnuCash passes dates as integer y/m/d without using locale-specific
    formats, so we need to strip out 'E' and 'O' from the format when
    scanning dates or determining separators in gnc-date.
    
    None of '-', 'E', or 'O' are supported by boost (and '-' causes
    errors), so strip them out from formatters in gnc-datetime as well.
    
    See https://bugzilla.gnome.org/show_bug.cgi?id=795247.



Summary of changes:
 libgnucash/engine/gnc-date.cpp     | 47 +++++++++++++++++++-------------------
 libgnucash/engine/gnc-datetime.cpp | 24 ++++++++++++++++---
 2 files changed, 45 insertions(+), 26 deletions(-)