Log Message:
Update www/liferea to 1.10.17.

Changes:
 * Fixes Github #194: Add source dialog visually broken
   (reported by k0377)
 * Fixes Github #195: Out-dated documentation on enclosure download
   (reported by brian-in-crawford)
 * Fixes Github #223: Search folder dialog don't show rules
   (reported by Guido Masella)
 * Fixes Github #227: Preference dialog fails to load with latest
   GtkBuilder (patch by Yanko Kaneti)
 * Fixes Github #234: Segmentation fault upon attempting to add an OPML
   (reported by GreenLunar)
 * Fixes compilation error when there is no libnotify
 * Added debugging for #258: Dialog loading issues
   (patch by glitsj16)