/auth/api/forward?public=1 passes requests through with a Remote-Public
header (anonymous/forbidden/authenticated) instead of 401/403, so routes
can allow anonymous visitors while still identifying logged-in users.
Reauth (max_age) still requires the auth flow. Documented in Headers.md,
api/forward.md, Integration.md and all proxy guides.
perm=a|b+c now means (a or b) and c; repeated perm args remain ANDed.
Out-of-spec values (empty alternatives, chars outside the scope charset,
stray %2B) are rejected with 400 instead of being silently misparsed;
extra spaces between groups are tolerated. Forward endpoint 400/500
details name /auth/api/forward as origin without echoing query args.
Wildcards are now filename-like: * stays within a :- or /-separated
segment, ** spans segments, partial segments allowed. Slash added to
allowed scope characters for path-based permissions.
LeoVasanko