Cd - add more input verification.

Cd - add more input verification.
Cp - support "\" as root of drive indicator.
Load - invert "-nc" to not connect.
Ls - ignore archive file attribute.
Map - add more input verification.  fix add by handle.
Mv - support overwrite question. support "\" as root of drive indicator.
Parse - add comments.
Rm - add comments.
TimeDate - add more input verification. add comments.
Vol - add new command.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11426 6f19259b-4bc3-4df7-8a09-765794883524