Updated patches to latest patchset and removed upstreamed ones.

Ran init script through shellcheck. Restart using SIGHUP.

Added logging from stderr as any kind of logging is missing in --no-daemon
mode.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

With mpd's build system, it requires either an iconv built into the libc
or icu. Since uClibc-ng as configured by OpenWrt currently has no iconv,
use icu for it to work around the problem. This is the simplest solution.

Added a patch to use boost's rounding functions. They are more appropriate
and work with uClibc-ng.

Signed-off-by: Rosen Penev <rosenp@gmail.com>