Duplication of C# and VB compiler messages and folders

[BillWagner]

The C# compiler error messages are located in two different directories.

/docs/csharp/misc and /docs/csharp/language-reference/compiler-messages.

They should all be in the 2nd directory, and we need to update the F1 help for Visual Studio to point to the correct location.

The same is true for VB:

/docs/visual-basic/misc

/docs/visual-basic/language-reference/error-messages

/cc @Pilchie

[Pilchie]

VS doesn't point to a directory - we just push the error message id, and the F1 help service does a lookup on the server.

[mairaw]

It would be interesting to talk with Bill Chiles and see if he knows why this was split. I see some that are in misc and not in compiler-messages and vice-versa. F1 help should just work since the F1 metadata is already present in the topics.

[rpetrusha]

When we move the files out of the misc directories, we can do a global redirect of all docs//misc URLs rather than add them one-by-one into the redirects file.