cubicweb-pyramid #5724484 add support for config file options overriding at startup (cmdline options) [validation pending]

like https://www.cubicweb.org/ticket/5557656

prioritynormal
typeenhancement
done in0.3.0
load left0.000
closed by#e95725d7ce90 Allow to override config file options by cmdline arguments (closes #5724484)
patchAllow to override config file options by cmdline arguments (closes #5724484) [applied]