Nested sessions are either falsely reported by /nsm/server/list or not supported by the session manager GUI

[jackaudio]

Nested sessions are either falsely reported by /nsm/server/list or not supported by the session manager GUI

[diovudau]

It has been reported that session lookup currently recursively looks at all files, instead of just at directories and the "session.nsm". This is wasteful and may lead to symlink problems (see #56). Session lookup should only do the minimal amount of work and stop recursive parsing once it finds the file session.nsm.

[diovudau]

This is fixed in git master. The API document is also prepared and written, but that is in another git branch at the moment.