* be as close as possible to the original code (except for extra
src/b64/utils sub-directory)
* use new base64_encode_no_lf() function with no line returns
* fix irc_server_sasl_authenticate(): add missing free(raw_str)
* add a lastsync status file in src/b64 for tracking
Signed-off-by: Loïc Gomez <bip@animanova.fr>