xv is long dead on modern systems.  Use 'display' for tests instead.
xv is long dead on modern systems.  Use 'display' for tests instead.

Also, remove some obsolete files.

rcancro/giflib,Distrotech/giflib,rcancro/giflib,Distrotech/giflib,cention-sany/libgif,rcancro/giflib,cention-sany/libgif