tools: allow to force UTF-8 encoding for file_set_contents
Rationale: This is used from cfs_write_file, which is now also used to
write utf8-encoded strings that come from Rust. If no encoding is
specified while writing the file, we run into problems with certain
special characters (e.g. 'ü').
Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>
[FG: use flag parameter instead of encoding as a string
use stricter 'UTF-8' instaed of 'utf8' (see 'perldoc Enocode')] Suggested-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
[FE: implement changes suggested by Fabian
move binmode call to where $fh is known to be set] Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>