samba-0001: security_token_has_sid O(A*S) in se_access_check
- security_token_has_sid() does O(S) linear scan over token SIDs
- called inside O(A) ACE loop in se_access_check_implicit_owner()
- O(A*S) per file access; S=200 groups, A=20 ACEs = 4000 comparisons
- fix: sort token->sids[2..] at finalization, use bsearch for O(log S)
- 9.5x measured speedup (S=200, A=20); up to 26x at S=200, A=50
- hot path: called on every smbd file open / access check
samba-0002: security_token_create O(N^2) SID dedup (source4 AD DC path)
- nested for-loop in security_token_create deduplicates SIDs O(N^2)
- Kerberos PAC with 500 group SIDs: ~125,000 dom_sid_equal() calls/login
- at MS-KILE 1015-SID limit: ~515,000 calls per DC login
- fix: binary insertion sort scratch array for O(N log N) dedup
- 5.7x speedup at N=500, 9.3x at N=1000 (near PAC limit)
- also applies security_token_sort_sids() after token build
MOAD-0002: smbd is single-threaded event loop, global state is by design
MOAD-0003: no thread-local credential storage found
MOAD-0004: all sensitive dumps guarded by #ifdef DEBUG_PASSWORD compile flag
MOAD-0005: all caches TDB-synchronized or single-threaded event loop
