kayos_server_main: setsockopt SO_KEEPALIVE for incoming connections
kayos: Make the client take a db name from the command line. Hm.
.gitmodules: Adding libuv dependency for epoll/kqueue.
kayos: Validate db path names the same as couchdb. a-z, then a-z, 0-9, _$()+-/
Make the directory for kayosdbs.