Be more specific about what enablestyles parameter does.

The enablestyles configuration variable and parameter flag manages the
global application of styles, not just the site-specific styles.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

config.def.h

@@ -30,7 +30,7 @@ static int diskcachebytes         = 5 * 1024 * 1024;
 static Bool enableplugins         = TRUE;
 static Bool enablescripts         = TRUE;
 static Bool enableinspector       = TRUE;
-static Bool enablestyles          = TRUE;
+static Bool enablestyle           = TRUE;
 static Bool loadimages            = TRUE;
 static Bool hidebackground        = FALSE;
 static Bool allowgeolocation      = TRUE;