Removed an unnecessary "to" in the "What are "hostname doesn't match" errors?" section.
`Server-Name-Indication`_, or SNI, is an official extension to SSL where the
client tells the server what hostname it is contacting. This enables `virtual
-hosting`_ on SSL protected sites, the server being to able to respond with a
+hosting`_ on SSL protected sites, the server being able to respond with a
certificate appropriate for the hostname the client is contacting.
Python3's SSL module includes native support for SNI. This support has not been