1.0.0

rs-tftpd is being used in production environments for years now, and it is ready for a full release.

• added a flag to abort ongoing operations (@calandoa)
• timeoutms option changed to utimeout to work with hpa-tftp (@calandoa)
• bugfix: started counting for timeout after last packet, and not window start (@calandoa)
• bugfix: use a min buffer size for rx (@calandoa)