Small config file documentation improvements

redis.conf

@@ -46,7 +46,7 @@
 # internet, binding to all the interfaces is dangerous and will expose the
 # instance to everybody on the internet. So by default we uncomment the
 # following bind directive, that will force Redis to listen only into
-# the IPv4 lookback interface address (this means Redis will be able to
+# the IPv4 loopback interface address (this means Redis will be able to
 # accept connections only from clients running into the same computer it
 # is running).
 #
@@ -66,6 +66,8 @@ port 6379
 # will silently truncate it to the value of /proc/sys/net/core/somaxconn so
 # make sure to raise both the value of somaxconn and tcp_max_syn_backlog
 # in order to get the desired effect.
+# Linux will round this value up to the nearest power of two
+# using tcp-backlog + 1, so 511 becomes 512.
 tcp-backlog 511
 
 # Unix socket.
@@ -86,7 +88,7 @@ timeout 0
 # of communication. This is useful for two reasons:
 #
 # 1) Detect dead peers.
-# 2) Take the connection alive from the point of view of network
+# 2) Keep the connection alive from the point of view of network
 #    equipment in the middle.
 #
 # On Linux, the specified value (in seconds) is the period used to send ACKs.
@@ -154,7 +156,7 @@ databases 16
 #   Will save the DB if both the given number of seconds and the given
 #   number of write operations against the DB occurred.
 #
-#   In the example below the behaviour will be to save:
+#   In the example below the behavior will be to save:
 #   after 900 sec (15 min) if at least 1 key changed
 #   after 300 sec (5 min) if at least 10 keys changed
 #   after 60 sec if at least 10000 keys changed