Add HTTPS example

doc/Jamfile.v2

@@ -51,7 +51,12 @@ explicit callout ;
 
 install examples
     :
-        [ glob ../examples/*.* ]
+        [ glob
+            ../examples/*.cpp
+            ../examples/*.hpp
+            ../examples/ssl/*.cpp
+            ../examples/ssl/*.hpp
+            ]
     :
         <location>$(here)/html/examples
     ;

doc/examples.qbk

@@ -83,6 +83,13 @@ int main()
 }
 ```
 
+[heading HTTPS GET]
+
+This example demonstrates sending and receiving HTTP messages
+over a TLS connection. Requires OpenSSL to build.
+
+* [@examples/http_ssl_example.cpp]
+
 [heading HTTP Crawl]
 
 This example retrieves the page at each of the most popular domains