A profile is not needed to create instances of basic initialization
commands such as AUTH (authentication) and SELECT (database selection)
since they do not need prefixing and other stuff.
If needed, developers can still extend the base connection factory to
make it use a server profile and configure the client to use it using
options.
When no server profile is specified, the connection factory will not push
any initialization command to the newly created connection object.
This change is mainly useful when using redis-cluster and also makes it
possible to easily inject commands such as "SCRIPT LOAD" at initialization
time by grouping everything into one common place simply by extending the
connection factory class.
Daniele Alessandri