fix: config/VirtualBox_VMs/vegbiendev/README.TXT: to test the import: `make` commands: use `yes|` to avoid needing to confirm prompts

fix: config/VirtualBox_VMs/vegbiendev/README.TXT: to test the import: `make mk_db ...`: use `yes|` to avoid needing to confirm prompts

config/VirtualBox_VMs/vegbiendev/README.TXT: to test the import: to test a different revision: added step that if any of the commands after `svn up` are broken, try a different revision

bugfix: config/VirtualBox_VMs/vegbiendev/README.TXT: to test the import: `make db`: need to run `schemas/reinstall` manually because older versions of the codebase just used `schemas/install`

config/VirtualBox_VMs/vegbiendev/README.TXT: to test the import: documented the range from within the revision should be chosen

config/VirtualBox_VMs/vegbiendev/README.TXT: `svn up`: documented runtime (1 min)

bugfix: to set up the VM: to use a database backup: also need to `make rm_initial_public` because initdb creates a non-empty DB

config/VirtualBox_VMs/vegbiendev/README.TXT: to test the import: added steps to test a different revision

config/VirtualBox_VMs/vegbiendev/README.TXT: `sudo apt-get dist-upgrade`: documented runtime (12 min)

config/VirtualBox_VMs/vegbiendev/README.TXT: updated VM snapshot names