Consider adding support for multiple sessions for a single user

[vpavic]

As a part of simplifications of integration with the Servlet APIs that was done in #906, the existing support for multiple sessions for a single user was removed. We should consider re-introducing this feature based on the new API while also taking into account the reactive support.

[dzj2046]

+1

[smorandi]

+1

[gmedici]

+1

[rwinch]

For those doing a +1 on the issue, please ensure you do a reaction of to the original description as this ensures we have a tally of those interested.

[nguyentienlinh2611]

+1

[mattluce]

Any plans to add this back into the library?

[TalSheffer]

Much needed, +1