mrtgInit() is not checking if filename parameter is NULL so
when dvblast is run without -Z option that sets mrtg file
the following error is seen in valgrind:

 Syscall param open(filename) points to unaddressable byte(s)
    at 0x412798E: __open_nocancel (in /lib/libc-2.13.so)
    by 0x40BCA33: __fopen_internal (in /lib/libc-2.13.so)
    by 0x40BCA9B: fopen@@GLIBC_2.1 (in /lib/libc-2.13.so)
    by 0x8062841: mrtgInit (mrtg-cnt.c:167)
    by 0x4073DB5: (below main) (in /lib/libc-2.13.so)

This patch fixes compilation warnings related to ssize_t when
dvblast is compiled on 64 bit machine. The fixed warnings are:

comm.c: In function "comm_Read":
comm.c:86:18: warning: format "%d" expects type "int", but argument 3 has type "ssize_t"
comm.c:168:14: warning: format "%d" expects type "int", but argument 5 has type "ssize_t"

dvblastctl.c: In function "main":
dvblastctl.c:248:18: warning: format "%d" expects type "int", but argument 3 has type "ssize_t"

The tmpnam(3) is used correctly but in order to avoid stupid
GNU linker from complaining, rewrite the code to use mkstemp(3).

* Makefile: Removed old kernel include, since kernel headers have had the S2API headers for a long time now.

Before this patch TS discontinuity and transport_error warnings
were missing vital info that can help to pinpoint stream problems.
The messages were looking like this:

warning: TS discontinuity
warning: transport_error_indicator on pid 1234

With this patch a lot useful info is added to the messages. PID,
how much continuity counters differ, service id and stream type.
The changed messages look like this:

transport_error_indicator on pid %hu

warning: TS discontinuity on pid  514 expected_cc  1 got 11 (H.264/14496-10 video (MPEG-4/AVC), sid 2005)
warning: TS discontinuity on pid   48 expected_cc 15 got 12 (EMM, sid 0)
warning: TS discontinuity on pid  774 expected_cc  0 got  2 (13818-3 audio (MPEG-2), sid 2015)
warning: TS discontinuity on pid    0 expected_cc 11 got 12 (PAT, sid 0)
warning: TS discontinuity on pid 2000 expected_cc 13 got 14 (PMT, sid 2020)
warning: transport_error_indicator on pid 2000 (PMT, sid 2020)

* dvbiscovery.sh: NIT can take longer than 15s. * dvbiscovery_dvb-s.conf: Change transponder list for a better efficiency.

* dvbiscovery: Support adapters with multiple frontends. * dvblast, dvblastctl: Trust the process's umask. * en50221.c: In XML mode, output the name of the CAM.

* demux.c, dvblast.c: New --select-pmts parameter which sets a demux filter on all PMTs (intermediate between normal mode and budget mode).

DVBlast hangs when dvb_Reset() in ASI mode. When using ASI as input there is no
need to reset the device and especially resetting a DVB device is wrong. Therefor
abstract the call to dvb_Reset() and replace it with pf_Reset(). Also the udp input
is adapted to provide a function for pf_Reset(). Both asi_Reset() and udp_Reset()
do nothing.