Fix /builder when applied to buildings under construction.

Ensure that the building name is never NULL.
Use the trace entity, not the entity ‘in’ the build log, for the name.
Remove Sys_SnapVector
Some canonicalisation of key names shown by /bind.
Fix displaying demo name when loading demo
Fix NET_IPSocket and NET_IP6Socket return type

It was causing a warning on Windows x64.
Prepend \ even for the dedicated server and tty client.

This fixes a bug where tab completed commands are executed with com_consoleCommand instead of as regular commands.
Merge branch 'master' (early part) into resources