Filter out invalid messages that have the nanoseconds wrong for their cycle

See merge request cds/advligorts!263

 * Fix the checks in mbuf_probe gap_check to catch this case
 * Add a filter to cps_recv
 * Add an integration test
 * extend fe_simulation to simulate a timing glitch that sets the wrong nano-seconds value

RCG: Dolphin broadcast node changed from 4 to 252.

Closes #291

See merge request cds/advligorts!262

RCG: Dolphin broadcast node changed from 4 to 252.  This change allows node 4 to work like a normal node.

Exported Dolphin segments now properly unexported when there's an error farther down the line during initialization.

Some slight improvements to Dolphin initialization error messages.

 * Print out more timing information to help see if there is bad data.
 * Correct an existing debug output that was printing the cycle count instead of the nanoseconds.

RCG: Improve feedback from dolphin initialization.

See merge request cds/advligorts!261

startup sequencer: when START_MODELS is false, run startup sequencer, but...

See merge request cds/advligorts!260

startup sequencer: when START_MODELS is false, run startup sequencer, but don't link start_world.target to multi-user.target.  All the unit files should be created, but models, edc, local_dc and cps_xmit won't start.

GDSTP screen "IO" time modified to show most of ADC read time in microseconds.

Closes #280

See merge request cds/advligorts!259

Find name collision

See merge request cds/advligorts!258

MAX_IO_MODULES must match between io models, user models, awgtpman for MBUF datastructures to match.

The branch allows backporting some fixes to systems running 4.2.0 and older RCG.

awgtpman: stream and awg buffers now allocated based on model rate.

See merge request cds/advligorts!257

awgtpman: stream and awg buffers now allocated based on model rate.  This keeps memory usage low on slow systems, while allocating big enough buffers for fast systems.

fix x2sqz build failure related to goto->goto change

Closes #268

See merge request cds/advligorts!256

Some models have dangling "From" tags that are not linked to anything.  RCG now issues a warning and just deletes the tag.

RCG: add_line() used by remote_tags() in Parster3.pm now creates different 'Branch' and 'Line' objects as required by find_branch().  This change fixes remove_busses(), which was operating on the second segment of complex lines, but neede the first.

"TOTAL" time now reads this same IO time plus the time to run through all 'UNDERSAMPLE' or 'clock_div' model calculations.

For most models that amounts to only one calculation, but for a fast ADC model running at 524 Hz, but spitting out data at 65 Hz, that's all 8 calculations.

Fix RCG so that Goto -> From pairs can lead directly into another Goto.

Closes #268

See merge request cds/advligorts!253

synchronization frequency output from -b option made to pull from correct register.

rcg: Changed add_line so that it will work if the parent line, perhaps erroneously, has children (they won't get deleted).  "remove_destination" sets empty string instead of "undef" to destination label.

Add several diagnostics registers to the LPTC driver and to the related /sys file system

See merge request cds/advligorts!252

gpstime: lptc_info script now handles all "on board" registers including temperature, voltages and currents.

internal power supply registers /sysfs output changed to look like a comma separated array, same as the external supply.

Corresponding packaging changes are needed.