httpserver: remove jekyll, hugo. Replace by filebrowser (#2417)

caddyhttp/httpserver/plugin.go

@@ -660,12 +660,10 @@ var directives = []string{
 	"fastcgi",
 	"cgi", // github.com/jung-kurt/caddy-cgi
 	"websocket",
-	"filemanager", // github.com/filebrowser/caddy/filemanager
+	"filebrowser", // github.com/filebrowser/caddy
 	"webdav",      // github.com/hacdias/caddy-webdav
 	"markdown",
 	"browse",
-	"jekyll",    // github.com/filebrowser/caddy/jekyll
-	"hugo",      // github.com/filebrowser/caddy/hugo
 	"mailout",   // github.com/SchumacherFM/mailout
 	"awses",     // github.com/miquella/caddy-awses
 	"awslambda", // github.com/coopernurse/caddy-awslambda