Tests whether there is any other process except the caller that is not marked as "internal server".
any-other-process-non-internal-server-p => result
any-other-process-non-internal-server-p is the predicate for whether there is any other process, except the caller process, that is not marked as "internal server".
Processes are marked as "internal server" by a true value for
:internal-server amongst the keywords in a call to process-run-function.
LispWorks User Guide and Reference Manual - 20 Sep 2017