[FIX] ensures no illegitimate cli argument is silently discarded
[FIX] ensures no illegitimate cli argument is silently discarded

This avoids an insidious behavior: when copy-pasting a command from a
Microsoft document to the cmd terminal, one might not see that a hyphen ('-')
preceding an option has been converted to a dash (u'\u2012') which is then
interpreted as a normal cli argument (i.e. not an option) and thus silently
discarded.


akretion/openerp-server,akretion/openerp-server,akretion/openerp-server