Fix spelling of "doesn't"

INSTALL.md

@@ -22,7 +22,7 @@ Important configure arguments include:
 
 - `--listener`. This is the only required argument. You must
   choose a listener that passes network requests to
-  gophernicus, as gophernicus dosen't do this by itself. The
+  gophernicus, as gophernicus doesn't do this by itself. The
   options are:
   - systemd, a common init system on many Linux distributions
     that can do this without an external program.

README.md

@@ -178,7 +178,7 @@ directories and you're (kind of) up and running.
 
 There is a serious issue with virtual hosting.
 
-As stated previously, RFC1436 dosen't support virtual hosting. Clients won't
+As stated previously, RFC1436 doesn't support virtual hosting. Clients won't
 like it.
 
 How the virtual hosting works, is that it loops through the vhosts looking for