add back caches.json in docs/configs

Author: DrDaveD

docs/configs/caches.json

@@ -0,0 +1,10 @@
+[ 
+    {"name":"root://its-condor-xrootd1.syr.edu", "status":1},
+    {"name":"root://sc-cache.chtc.wisc.edu", "status":1},
+    {"name":"root://osg-new-york-stashcache.nrp.internet2.edu", "status":1},
+    {"name":"root://osg-kansas-city-stashcache.nrp.internet2.edu", "status":1},
+    {"name":"root://osg-chicago-stashcache.nrp.internet2.edu", "status":1},
+    {"name":"root://fiona.uvalight.net", "status":1, "longitude":4.8995},
+    {"name":"root://stashcache.t2.ucsd.edu", "status":1},
+    {"name":"root://osg-gftp.pace.gatech.edu", "status":1}
+]