a475de45c9
Features: - ForwardRule: Allow/Deny rules with address/port specifications - ForwardAcl: User-specific ACL with priority-based rule matching - ForwardAclManager: Global ACL manager for all users - OpenSSH-style PermitOpen/PermitListen parsing - 8 unit tests for all operations Security: - Prevent unauthorized SSH tunnel creation - Restrict forwarding to specific hosts/ports - Default deny policy for unknown users Files: - markbase-core/src/ssh_server/forward_acl.rs (493 lines) - markbase-core/src/ssh_server/mod.rs (+1 line) Tests: 317 passed (+8)