changed rprm.trise setting in site.c to actually be rise time

The trise parameter in the ControlPRM struct set in in site.c in the usr/codebase/superdarn/src.lib/os/site.xxx/src folder is now actually rise time in microseconds. 

QNX still works in terms of corner frequency, which makes sense because that is how it calculates filter coefficents.
The ddsserver_tcp_driver on linux converts the rise time to a corner frequency and sends the time and sends that to qnx. Variables names for rise time calculations should no longer be actively misleading.

If you think the change from trise to fcutoff should happen somewhere else, I'm open to suggestions. 

The azores site.c files were modified as an example of what in site.c would need to be changed when applying this fix.