Punctuation and grammar fixes.

INSTALL

@@ -71,7 +71,7 @@ Building the Code
    also specify it on the configure command line, like so:
       % ./configure CC=gcc-4.2
 
-   The configure script accepts a number of other options and honors a
+   The configure script accepts a number of other options and honors
    additional environment variables.  For a full list, invoke
    configure with the --help option.
 

README

@@ -43,7 +43,7 @@ of an OpenFlow switch, comprising:
 
 This distribution includes some additional software as well:
 
-	- controller, a simple program connects to any number of
+	- controller, a simple program that connects to any number of
           OpenFlow switches, commanding them to act as regular MAC
           learning switches.
 

lib/vconn-ssl.c

@@ -583,7 +583,7 @@ struct vconn_class pssl_vconn_class = {
 /*
  * Returns true if OpenSSL error is WANT_READ or WANT_WRITE, indicating that
  * OpenSSL is requesting that we call it back when the socket is ready for read
- * or writing (respectively.
+ * or writing, respectively.
  */
 static bool
 ssl_wants_io(int ssl_error)