Client-side use of databases.conf doesn't support modern URLs as value of an alias

[mrotteveel]

Client-side, it is possible to specify aliases that have a legacy connection URL as its value:

testdb = localhost:E:\DB\FB5\FB5TESTDATABASE.FDB
{
    AuthClient = Legacy_Auth
}

When connecting with testdb, it will connect to localhost:E:\DB\FB5\FB5TESTDATABASE.FDB (using the specified config). If you specify localhost:E:\DB\FB5\FB5TESTDATABASE.FDB, it will also use the specified config.

However, the value of the alias can not be a modern url:

testdb2 = inet://localhost/E:\DB\FB5\FB5TESTDATABASE.FDB
{
    AuthClient = Legacy_Auth
}

With this config, attempts to connect with testdb2 will fail with error

Statement failed, SQLSTATE = 08006
Unable to complete network request to host "inet".
-Failed to locate host machine.
-The specified name was not found in the hosts file or Domain Name Services.

And attempts to connect with inet://localhost/E:\DB\FB5\FB5TESTDATABASE.FDB will not apply the specified configuration.

Expected behaviour would be for it to work the same as when the alias value is a legacy URL.