this is related only for htb

Before this commit shaper used ses->unit_idx as class id, but it is not unique.
This commit introduces internal map to manage unique class ids

If specified then fwmark filters will be installed to bypass shaper

shaper: introduced moderate-quantum option

If fixed quantum is not specified and moderate-quantum is specified then shaper module
will check for quantum value to be in valid range (1000-200000).
This suppresses annoying kernel messages.
Remark: quantum is rate/r2q, rate is in bytes/sec.

Parameters are same as for tc:
[shaper]
leaf-qdisc=fq_codel [ limit PACKETS ] [flows NUMBER ] [ target TIME ] [ interval TIME ] [ quantum BYTES ] [ [no]ecn ]

Signed-off-by: NDmitry Kozlov <xeb@mail.ru>

Signed-off-by: NDmitry Kozlov <xeb@mail.ru>

Fixes detection of range everlaps (time range end time is equal to start time of other range),
which prevents starting range end timer.
Signed-off-by: NDmitry Kozlov <xeb@mail.ru>

shaper: do not start time range end timer if end time is equal to start time of other range
Signed-off-by: NDmitry Kozlov <xeb@mail.ru>

shaper: implemented 'rate-multiplier' option to bring values to kilobits if radius sends in different basis

Explicitely interpret zero values when parsing boolean options. This
allows to unset boolean parameters such as "verbose" when reloading
the configuration.
Signed-off-by: NGuillaume Nault <g.nault@alphalink.fr>

shaper_tbf: do explicit locking over nl_socket_alloc/nl_socket_free due to this functions are not thread-safe

shaper_tbf: fixed bug of incorrect operation when time ranges are spicified and connection whithout time range identifier is arrived

dynamicaly check if radius module loaded (so not more require to rebuild project without RADIUS to switch to chap-secrets)