Rename _instance_path to _config_dir_path, because that's what it points to.
Rename _instance_path to _config_dir_path, because that's what it points to.

A DXR "instance" is the "target" folder.
kleintom/dxr,KiemVM/Mozilla--dxr,kleintom/dxr,KiemVM/Mozilla--dxr,srenatus/dxr,pelmers/dxr,pelmers/dxr,pombredanne/dxr,kleintom/dxr,jay-z007/dxr,pombredanne/dxr,pombredanne/dxr,pelmers/dxr,KiemVM/Mozilla--dxr,gartung/dxr,erikrose/dxr,pelmers/dxr,nrc/dxr,jay-z007/dxr,gartung/dxr,jbradberry/dxr,jay-z007/dxr,nrc/dxr,srenatus/dxr,kleintom/dxr,gartung/dxr,gartung/dxr,jbradberry/dxr,KiemVM/Mozilla--dxr,pombredanne/dxr,jbradberry/dxr,jay-z007/dxr,jbradberry/dxr,jay-z007/dxr,pombredanne/dxr,pelmers/dxr,jbradberry/dxr,nrc/dxr,erikrose/dxr,kleintom/dxr,srenatus/dxr,bozzmob/dxr,erikrose/dxr,gartung/dxr,erikrose/dxr,KiemVM/Mozilla--dxr,KiemVM/Mozilla--dxr,bozzmob/dxr,bozzmob/dxr,nrc/dxr,bozzmob/dxr,bozzmob/dxr,pelmers/dxr,gartung/dxr,nrc/dxr,kleintom/dxr,pombredanne/dxr,srenatus/dxr,jbradberry/dxr,bozzmob/dxr,kleintom/dxr,pelmers/dxr,pombredanne/dxr,nrc/dxr,jay-z007/dxr,srenatus/dxr,jbradberry/dxr,srenatus/dxr,erikrose/dxr,jay-z007/dxr,bozzmob/dxr,gartung/dxr