treewide: Correct typos and spell plural of bus consistent

src/libsystemd/libsystemd.sym.m4

@@ -63,7 +63,7 @@ global:
         sd_journal_open_files;
         sd_journal_open_container;
 
-        /* sd-dameon */
+        /* sd-daemon */
         sd_booted;
         sd_is_fifo;
         sd_is_mq;

src/libsystemd/sd-bus/bus-kernel.c

@@ -1593,7 +1593,7 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
 
         make->size += ALIGN8(n->size);
 
-        /* The busses we create make no restrictions on what metadata
+        /* The buses we create make no restrictions on what metadata
          * peers can read from incoming messages. */
         n = KDBUS_ITEM_NEXT(n);
         n->type = KDBUS_ITEM_ATTACH_FLAGS_RECV;

src/libsystemd/sd-rtnl/rtnl-message.c

@@ -45,7 +45,7 @@ static int message_new_empty(sd_rtnl *rtnl, sd_rtnl_message **ret) {
 
         /* Note that 'rtnl' is currently unused, if we start using it internally
            we must take care to avoid problems due to mutual references between
-           busses and their queued messages. See sd-bus.
+           buses and their queued messages. See sd-bus.
          */
 
         m = new0(sd_rtnl_message, 1);