Comment unavailable options and set default database and log locations.

Index: scripts/murmur.ini
--- scripts/murmur.ini.orig
+++ scripts/murmur.ini
@@ -13,7 +13,7 @@
 
 ; Path to database. If blank, will search for
 ; murmur.sqlite in default locations or create it if not found.
-database=
+database=${LOCALSTATEDIR}/murmur/murmur.sqlite
 
 ; Murmur defaults to using SQLite with its default rollback journal.
 ; In some situations, using SQLite's write-ahead log (WAL) can be
@@ -51,7 +51,7 @@ database=
 ; Murmur defaults to not using D-Bus. If you wish to use dbus, which is one of the
 ; RPC methods available in Murmur, please specify so here.
 ;
-;dbus=session
+;dbus=system
 
 ; Alternate D-Bus service name. Only use if you are running distinct
 ; murmurd processes connected to the same D-Bus daemon.
@@ -62,7 +62,7 @@ database=
 ; with ICE, you should only use it if you trust all the users who have
 ; shell access to your machine.
 ; Please see the ICE documentation on how to specify endpoints.
-ice="tcp -h 127.0.0.1 -p 6502"
+;ice="tcp -h 127.0.0.1 -p 6502"
 
 ; Ice primarily uses local sockets. This means anyone who has a
 ; user account on your machine can connect to the Ice services.
@@ -77,7 +77,7 @@ ice="tcp -h 127.0.0.1 -p 6502"
 ; access will be denied.
 
 ;icesecretread=
-icesecretwrite=
+;icesecretwrite=
 
 ; If you want to expose Murmur's experimental gRPC API, you
 ; need to specify an address to bind on.
@@ -99,7 +99,7 @@ icesecretwrite=
 ; logs to the file 'murmur.log'. If you leave this field blank
 ; on Unix-like systems, Murmur will force itself into foreground
 ; mode which logs to the console.
-;logfile=murmur.log
+logfile=${LOCALSTATEDIR}/murmur/murmur.log
 
 ; If set, Murmur will write its process ID to this file
 ; when running in daemon mode (when the -fg flag is not
@@ -438,6 +438,6 @@ allowping=true
 ; leave the defaults as they are.
 ; Please note that this section has to be last in the configuration file.
 ;
-[Ice]
-Ice.Warn.UnknownProperties=1
-Ice.MessageSizeMax=65536
+;[Ice]
+;Ice.Warn.UnknownProperties=1
+;Ice.MessageSizeMax=65536