adds sha2 support for keyfile auth

adds new tool for webserver control srvctrl

adds public aio and poll api and asynchronous send_range function aio

adds wrapper for close syscall with error handling

refactors kqueue event handler aio

check close return value

fixes crash on broken urls

srvctrl gets log messages srvctrl

adds debug log level srvctrl

refactors vfs code aio

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mercurial