GUI wallets for linux and windows. Maintenance release. New rcp, fresh dependences, actual seeds, checkpoints.

Chain maintenance release with fresh daemon and GUI wallets for linux and windows

Added -sendchangetoaddress RPC command — sends change outputs each time to the same (own) address.
New blockchain checkpoints.
Updated NS seeds to actual.
Fix build of old source code on newer platforms (tested on Debian 11–13).
Build with new libs for security (openssl etc)