Sync w master: add polyline insert/drop
Cosmetic change: w_old -> old_w in ge_axis.c
Undo/redo revisited
correct bug: g_strdup => g_strdup_printf
sync pars.yacc: add TARGET POLYLINE, enhance COMPOUD
Sync with gtk3 branch for PolylineType
Cosmetic changes in Python interface
Comment croix_2_inline[] definition
Changes to avoid new gcc-8 warnings (mainly snprintf)
better detect connected cable
Fix the TODO concerning the detection of network cable plugged.
Ask makefile to not overwrite the existing config file
initial commit
Fix locale setting when not using wxWidgets