Adding flight alias to flightsql

Add flightsql scheme

Fixing DSN generation for SQL Server

Generated DSNs for SQL server were incorrect, after the change to
preferred/different SQL Server package.

Changes sqlserver:// scheme

Latest sqlserver driver accepts direct URLs. This is needed when
connecting to azuresql DSNs and using the `fedauth` query parameter.

NOTE: This is a breaking change for any using packages NOT already
updated to the latest `github.com/microsoft/go-mssqldb` !!!

feat: adding support for Databend

Adding ShortAlias

Reformatting dburl.go

Update go-mssqldb driver reference

Minor maintenance

Changing dburl/passfile to recognize protocol aliases by default