Closes #63.  Update the error handling code when daqd calls nice.

Closes #63

See merge request cds/advligorts!102

Fix the error handling code to work with how nice has been implemented for a while.  Change to clearing errno and checking it after the call as proscribed by the man page.

install script cleanup

Closes #114

See merge request cds/advligorts!98

update post_build_script to pull correct SITE env var

See merge request cds/advligorts!100

remove code copy install-sh scripts

See merge request cds/advligorts!97

everything can be handled by main install script now.

just to keep related things together

* remove unnecessary variable creation and system calls
* better variable checking
* better logging

of cpu clock time, if available.

remove ambiguity and need for tconvert

supplanted by rts_module_ctrl

using systemd unit with shell wrapper now

eliminates need for separate install-noawg script

for easier readability

makes things much more readable

these are code copies of an install script from another program that
are not needed afaict

remove old daqconfig tcl script

See merge request cds/advligorts!99

not needed or used anymore

data from IOP via shared memory.

Added filter offset and gain ramping bit to SWSTAT Epics for all filter modules.
Bit 28 = gain ramping in progress when = 1
Bit 29 = offset ramping in progress when = 1
With the present masking in SDF, this will not show up as a Diff in SDF.

Work on #106, allow the broadcast port to be set in the daqdrc.

See merge request cds/advligorts!96

Update the daq parser to consume a port number as well as a broadcast interface name.

* This introduces a address:port parsing call into the net_writer code to allow it to handle both the port information as well.
* Removes a minor memory leak, by moving from strdup w/o a free to a std::string.
* As we no longer transmit data via daqd data concentrators this removes the DC code path from the net_writer broadcast section.
* Also removes to unneeded constants.

Updates to the sample daqdrc to address #100 & #97

Closes #97 and #100

See merge request cds/advligorts!93

Changing the defaults for shmem_input/size to good defaults so they do not need to be mentioned in the daqdrc.

1) feCodeGen and Parameter.pm: Added necessary settings for rates
   up to 512K sampling rate.
2) Parameter.pm now sets the SERVO rate compile flag eg -DSERVO64K
3) Added support for fast ADC GSC18AI64, for user app models in
   mapApp.c.
4) Changes in iop_adc_read() for mixed clock ADCs support.