Fix: Satisfy all with multiple Require directives (Issue #1304)

[abubakarsabir924-cell]

Problem

When using Satisfy all with multiple Require directives,
CUPS was granting access if ANY one condition passed instead
of requiring ALL conditions to pass.

Two bugs were found:

1. conf.c: Second Require directive was overwriting the
   level set by first Require
2. auth.c: OR logic was used instead of AND logic when
   Satisfy all was set

Fix

• conf.c: Prevent level overwrite on multiple Require directives
• auth.c: Implement proper AND logic for Satisfy all

Testing

Tested with user joe in @System group:

• joe in @System only → 401 Unauthorized ✅
• joe in @System + printadmin → 200 OK ✅

Fixes #1304

[abubakarsabir924-cell]

Hi @michaelrsweet Sir! This PR addresses #1304 by fixing the Satisfy all logic. I’ve corrected the level overwrite in conf.c and ensured that auth.c now uses AND logic for multiple Require directives. Tested locally and it now correctly restricts access unless all requirements are satisfied.