modprobe: add support for -l and -s. Remove some unsupported options

Fixed some goofs in help text

function                                             old     new   delta
modprobe_main                                        494     653    +159
packed_usage                                       27129   27145     +16
insmod_main                                           98      95      -3

Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
6 files changed