gnucash maint: Multiple changes pushed

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash/commit/267852ba (commit)
	 via  https://github.com/Gnucash/gnucash/commit/272ca421 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/ac2e0946 (commit)
	from  https://github.com/Gnucash/gnucash/commit/2634f23f (commit)



commit 267852ba763331aa04ab0f7be33d3d74f4297a82
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri Dec 28 18:47:06 2018 +0100

    Add a note on cvt and imbuing locales in a boost::filesystem::path object

commit 272ca421b73929e5bba1a585c854477414bea91c
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri Dec 28 18:36:46 2018 +0100

    Set up filepath utils to determine the GNC_CONFIG_HOME in the same way as GNC_DATA_HOME
    
    Until now GNC_CONFIG_HOME was more or less hard-coded.
    Now it can be set via environment variable GNC_CONFIG_HOME.
    In addition it will automatically be created to avoid potential
    user confusion.

commit ac2e0946eac6e00113bf1c4af48e9735230f1331
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Fri Dec 28 16:13:58 2018 +0100

    Rewrite path scrubbing in a c++ way



Summary of changes:
 libgnucash/core-utils/gnc-filepath-utils.cpp | 164 +++++++++++++++++++++------
 1 file changed, 131 insertions(+), 33 deletions(-)