Proposed work on boinccmd output

[RichardHaselgrove]

Describe the problem
We've had a cogent and well-argued request to add additional data - already present in BOINC Manager project properties dialog - to the --get_project_status output of boinccmd
Detecting situations where, "Scheduler RPC deferred for xx:yy:zz" has been issued.

Describe the solution you'd like
I've provisionally implemented min_rpc_time.
But looking at the existing output, there are multiple other bugs - additional blank lines (ctime supplies its own /n), zero reports for 'disk usage' and 'project files downloaded', and probably more as I look further. I'd also propose to move the stats block from 'jobs succeeded' to 'cross-project ID' above the project GUI_URL block.

Additional context
Especially in the context of #1457, are there any format constraints or design restrictions on the current layout that I should take into account? I doubt I'm ready to covert the whole of lib/gui_rpc_client_print.cpp to json (although I've generated rtf programatically in the past), but I think I could take on a first-stage cleanup as an isolated project - similar to #2327. I'll ask for comments at the next contributor call.