binary not added to PATH by tlmgr

[Karl Berry]

    Slightly curious why auto-invoking path after install would not be
    advisable, 

Because the situation on the system might have changed in any
conceivable way in the interim time (e.g., another texdoc installed
elsewhere, tex has been moved somewhere, ...) and we have no way to
know.  Thus it is safer not to assume.

    but may I suggest this is announced more explicitly in
    the docs?

Sure, I'll put somthing into the doc for the "install" action (after the
release is made). --thanks, karl.