Slightly smaller ldflags, or something

This was causing large allocations in heap: https://github.com/turt2live/matrix-media-repo/issues/445

See https://github.com/matrix-org/matrix-spec-proposals/pull/2448/files#r1316159044

Fixes https://github.com/turt2live/matrix-media-repo/issues/428

Fixes https://github.com/turt2live/matrix-media-repo/issues/425

Fixes https://github.com/turt2live/matrix-media-repo/issues/340

Fixes https://github.com/turt2live/matrix-media-repo/issues/444

Also fixes a memory issue where we'd decode the entire image before deciding that the image is too small for thumbnailing.

https://github.com/matrix-org/matrix-spec-proposals/pull/4034

For https://github.com/turt2live/matrix-media-repo/issues/415

Fixes https://github.com/turt2live/matrix-media-repo/issues/407
Closes https://github.com/turt2live/matrix-media-repo/issues/412
Closes https://github.com/turt2live/matrix-media-repo/issues/413

Closes https://github.com/turt2live/matrix-media-repo/issues/411
For https://github.com/turt2live/matrix-media-repo/issues/407

Otherwise we might end up with old config options until a restart

For https://github.com/turt2live/matrix-media-repo/issues/409
For https://github.com/turt2live/matrix-media-repo/issues/412

For https://github.com/turt2live/matrix-media-repo/issues/411

For https://github.com/turt2live/matrix-media-repo/issues/407
For https://github.com/turt2live/matrix-media-repo/issues/408
For https://github.com/turt2live/matrix-media-repo/issues/409

Fixes https://github.com/turt2live/matrix-media-repo/issues/73