* module/system/repl/server.scm (run-server): Remove case that handled
'interrupt' exceptions specially. It is no longer needed since
e6c8e6047e (REPL Server: Don't establish
a SIGINT handler.)
* module/system/repl/server.scm (run-server): Ignore SIGPIPE when we run
a server, as otherwise a rudely disconnected client could cause the
server to quit. Thanks to John Proctor for the report, and Detlev
Zundel for the debugging.
* module/system/repl/server.scm: New module, listens on a socket for
connections, then serves repls to those sockets.
* module/Makefile.am: Add repl server.