Use awwright's generic user agent defintion

Because it's much better than what I had there :-)

Author: handrews

jsonschema-hyperschema.xml

@@ -182,10 +182,10 @@
                             in the Link Description Object.
                         </t>
                         <t hangText="generic user agent">
-                            A user agent which is only aware of standardized link relations,
-                            media types, URI schemes, and protocols.  It may have an extensible
-                            architecture to allow adding support for standards beyond the core
-                            set of which it is aware.
+                            A user agent which can be used to interact with any resource, from
+                            any server, from among the standardized link relations, media types,
+                            URI schemes, and protocols that it supports; though it may be
+                            extendible to specially handle particular profiles of media types.
                         </t>
                         <t hangText="client application">
                             An application which uses a hypermedia system for a specific