0.15.19

• New: VFS module for Samba 4.17: small change in openat_fn function definition (const struct vfs_open_how *how param replaces int flags, mode_t mode) Fixes #311
• Improvement: Small improvements to --balance
• Improvement: Migration full path fo utf8mb4 to support emoji in file name
• Bugfix: not all MySQL version support all +/-HH:MM timezones; log an error when we try and fail to change the MySQL TZ (for the current session) Fixes #303
• Update install-greyhole-package.sh
• Using deb [signed-by=...] instead of apt-key (deprecated)