[PATCH] protocol_t upgrade

 This begins the libanyp.la SourceLayout changes by moving the
 protocol_t type code to stand-alone files inside its namespace.

 On the most part there are no behaviour changes. The automatic
 generation of the enum->text string produces an upper-case strings
 array, so explicit down-casing is added for the obvious places such as
 scheme:// syntax.

 Amos