optdb5.3

• Path: arch/private/optdb5.3
• 2026-07-15: build failure fixed and published, pkgrel 5 -> 6. Previously flagged as a “genuine compiler/source error” (incompatible function-pointer types – modern GCC strictness vs old C code): gcc 16.1.1 now errors (not just warns) on -Wincompatible-pointer-types by default, and this 2015-era Berkeley DB source (src/env/env_config.c) declares its dispatch tables with old K&R-style unprototyped function pointers (int (*func)();), which the compiler now treats as int (*)(void) and rejects when initialized with the real, typed function pointers (__env_add_data_dir etc).
• Fix: added -Wno-error=incompatible-pointer-types alongside the existing -Wno-error=implicit-function-declaration in build()’s CFLAGS. Packaging-only fix, no source/version change.
• Test-built clean with extra-x86_64-build, then built+signed+ published to the private repo (x86_64). See UPDATES.md’s 2026-07-15 entry for full detail.