Fix MSVC compiling error (argc/argv not available to pass to init_gettext)

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
Merge branch 'master' of https://github.com/minetest/minetest.git
Create CoreSettings and use them for most instance that will improve client performance
Update most time-critical (expensive) functions to use g_core_settings

Signed-off-by: Craig Robbins <kde.psych@gmail.com>