This was introduced in the previous few commits when adding support for multiple secrets in knockd. The logic to push and pop entries from the knockSequences slice needed to be adjusted to cound for the number of secrets that are loaded by hypd.
The syntax for the hypd server command has changed. Now instead of specifying an interface name as an argument to the server command, you instead specify a configuration file path.
Example:
./hypd server hypdconfig.json
To better support configuration and user friendliness, migrated to cobra based CLI. The source tree structure has also changed to single go module, the server has been renamed hypd and client has been named hyp. The original structure came into being organically, but now that the vision is more complete it's best to make these adjustments now.