Imports of azuread-service-principal command

PathSynopsis
database/sqlPackage sql provides a generic interface around SQL (or SQL-like) databases.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
github.com/microsoft/go-mssqldb/azuread
logPackage log implements a simple logging package.