virtio-net: Remove unused page size constant

The page_size constant is not used in the code so lets just remove it.

Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>
mman: Fix mmap() tracepoint

Exit tracepoints are useful to record errors, and also for timing the
mmap operation.

Signed-off-by Pekka Enberg <penberg@cloudius-systems.com>
imgedit: introduce getargs command

The new command prints arguments set in the image.
run.py: convert tab to spaces

In order to have consistent indentation.
java.c: Add support for -agentlib JVM option

This is needed to start the JVM with debugger interface.
scripts/run.py: start QEMU in nographic mode

This is in order to make it send Ctrl+C to the guest instead
of killing the VM. Leads to less surprises when working with
interactive shell inside OSv.