display process title in syslog when a gotd child process exits

remove dependency of gitwrapper on gotd/listen.c Move gotd_find_uid_connection_limit() from listen.c into parse.y and remove listen.c from the list of source files required by gitwrapper.

add support for protecting references against 'got send -f' to gotd ok op@

include sha2.h too where sha1.h is included In preparation for wide sha256 support; stsp@ agrees. Change done mechanically with find . -iname \*.[cy] -exec sam {} + X ,x/<sha1\.h>/i/\n#include <sha2.h>

drop double process name from some gotd logs i.e. "listen: listen: shutting down" -> "listen: shutting down" the procname is already prepended by vlog() ok jamsek

introduce connection options to gotd.conf Allow administrators to tweak the default authentication and request timeouts if needed, and to tweak the limit of concurrent connections for specific user accounts. with several tweaks from and ok op@

enforce a per-uid connection limit in the gotd listen process For now the limit is set at compile-time. It will become configurable via gotd.conf soon. ok op@

gotd listen process forgot to initialize its client table siphash key

move "unix" pledge promise from gotd parent to auth process The listen process now communicates the client UID/GID to the parent, and the auth process verifies this on behalf of the parent. This allows us to remove the "unix" pledge promise from the parent, removing parent access to syscalls such as listen() and accept() in the AF_UNIX domain. ok tracey@ op@

add a gotd "listen" process which watches the unix socket ok op@