objects/networking/sockets: Clean up error handling.

This needs more work; we should handle more error cases. However, this kind of
structure will be sufficient for now.

Signed-off-by: Corbin Simpson <cds@corbinsimpson.com> <simpsoco@google.com>
reactor: Slurp up signals.

Because signals can ruin your day otherwise.

Signed-off-by: Corbin Simpson <cds@corbinsimpson.com> <simpsoco@google.com>
Add an argument parser.

Also use parsed arguments.

Signed-off-by: Corbin Simpson <cds@corbinsimpson.com> <simpsoco@google.com>
load, nodes: Do some more loader fuzzing.

This was highly useful last time, too.

Signed-off-by: Corbin Simpson <cds@corbinsimpson.com> <simpsoco@google.com>