Revert "Add sel_ldr stderr to the loader log file"

This reverts commit f10424d46a6743d6e76757a9a4505c51bc675451.
Pipe sel_ldr stderr to the loader log file
Add a more descriptive message when an IPC socket has been closed by the remote end
Add Win64 sel_ldr and irt_core to Win32 external deps
Make sel_ldr verbosity configurable based on the value of vm.*.debugLoader
Use the x86_64 irt and vm nexe if running a Win32 engine in Win64
Bump version no.; update Debian changelog.
Add missing header for MSVC
Update source link in download-pk3-torrent.sh.
Merge branch 'master' into headers
Fix compilation on MinGW
Add support for slim LTO objects, also fixes GCC 4.9 LTO which uses slim objects by default