fix plugin/device init

• move call of InitMcli from cPluginMcli::Start to cPluginMcli::Initialize (#17)

libnetceiver carve-out/dependency

Major changes:

• adjustments to link dynamically against "libnetceiver"
  • Reduce to being only vdr-plugin
  • requires now "libnetceiver": https://github.com/vdr-projects/libnetceiver
  • netcv2dvbip is moved to: https://github.com/vdr-projects/

Enhancements:

• add DeviceName, contribution from #15

Fixes related to netcvupdate and lftp and others

• fix lftp support for netcvupdate and cam_menu.c
• add new options for plugin: --netcvupdate-use-lftp --netcvupdate-enable-debug
• fix some log statements and REELVDR related defines

Build for Fedora Linux can be found here
https://copr.fedorainfracloud.org/coprs/pbiering/vdr_extensions/packages/

Bugfix+Enhancement Release

Fixes

• fix idle priority handling
• apply adjusted fixes from https://www.vdr-portal.de/forum/index.php?thread/134181-mcli-error-video-data-stream-broken/&postID=1337872#post1337872
• in case of --cam-disable option is active, do not enable triggerCam
• apply vdr-plugin-mcli-0.9.6n_05-FixSetChannelDeviceCamAlloc.patch from https://www.vdr-portal.de/forum/index.php?thread/134181-mcli-error-video-data-stream-broken/&postID=1337625#post1337625
• apply vdr-plugin-mcli-0.9.6m_02-DeviceReadyWithCi.patch from https://www.vdr-portal.de/forum/index.php?thread/134181-mcli-error-video-data-stream-broken/&postID=1337593#post1337593
• apply vdr-plugin-mcli-0.9.6m_01-TriggerCamAllPids.patch from https://www.vdr-portal.de/forum/index.php?thread/134181-mcli-error-video-data-stream-broken/&postID=1337593#post1337593
• add triggerCam patch from https://www.vdr-portal.de/forum/index.php?thread/134181-mcli-error-video-data-stream-broken/&postID=1336731#post1336731
• introduce PreInit and PostExit to avoid crashes in case of other plugins have fatal issues and VDR has to stop instantly
• fix spec file for rpmbuild -ta
• add more header include fixes based on contribution from HelmutB

Enhancement

• aligned and extended logging
• add additional option '-n' to netcvupdate to use 'lftp' as FTP client
• extend with (currently hardcoded timings) interface watcher
• add additional special debug masks (see README), align/fix log prefix to "mcli::"
• add log skip mask option (--logskipmask) (see logging.h)
• improve debugging enhancement based on contribution from HelmutB
• include not covered patches from https://www.minidvblinux.de/forum/index.php?topic=9526.0
• add vdr/systemd/override.conf into RPM (via file in contrib subdirectory)

Review+Fixes+Compatiblity

• add new options
  --debug-mask (replace hardcoded ifdef debug by flexible option mask)
  --cam-disable (in case CAMs are generally not in use)
  --tuner-max (to limit amount of tuners in skins)

• fix locking issue with osdteletext and zapping

• add support for DeviceType (supported since 1.7.28)

• implement missing GetCurrentlyTunedTransponder (supported since 1.7.13)

• implement rate limiter for "Discontinuity on receiver" messages

• include RPM spec file and default config template

• General review, cosmetics, fix of compiler warnings, ...