Merge branch 'terencehill/misc_stuff' into 'master'

Useful tools for debugging

See merge request xonotic/xonotic-data.pk3dir!1152

diff --cc qcsrc/server/client.qc
Simple merge

diff --cc qcsrc/server/client.qh
Simple merge

diff --cc xonotic-client.cfg
Simple merge

diff --cc xonotic-server.cfg
Simple merge