Reformed buildsystem.
- replace malloc.h with stdlib.h
- use AC_CONFIG_HEADERS for cleaner compile output
- clean out some useless AC_* macros and add useful AC_TYPE_UINT* macros

Handle resolving hostnames gracefully.
Fix support for hostname:port in remoteio.
Added timeout parameter to multiio_poll().
Fix stupid mistakes in distrenslave's read handler.
The server and client may not sit and play table tennis at last :-D.

Fixed one of the stupidest mistakes one could make when using poll(); I used .events where I needed .revents.
Fixed typo in function name: mulitiio_poll_invoke_handlers() -> multiio_poll_invoke_handlers() and small variable initialization cleanup.