merge our local changes to bufio though.

- more consistent naming for libs (LDADD_LIB_*) - allow to change CC and CFLAGS as arguments - allow to specify the LDADD_LIB_* as arguments

On the BSDs the SHA1Init() and friends are part of libc, while on linux (and maybe other systems as well) we need an implementation of these function: libmd for example.

We still need an implementation of SHA1Init() & co, which on linux is not in libc (but is available with the same APIs in libmd.)

This allows amused-web to stay in sync using websockets (much like existing amused clients watch `amused monitor') and sends the forms in the background to avoid refreshing the page. Still missing is reopening the websocket, maybe blocking the UI in that case and showing the progress.

It's a first stab at it, some planned features (like the search) are missing but the basic ones work. It's not hooked in the main build yet.