add TDavixFile to access web files via libdavix
davix uses pread to trigger Range requests
modify user agent
added pread
initial vector read support
configure davix as default http plugin
fix compile warnings
make position thread safe on read
add missing LinkDef.h
- apply singleton pattern for open, improve performance
Add DAVIX library dependencies, extra libs.
Use "new" automatic streamer.
Use extralibs. Remove Rint - not needed.
- fix a bug in the Davix plugin name resolution
- correct initialization bug, overflow bug and add debug tracer
- add performance probe calls inside TDavixFile
Merge branch 'davix_adev' of https://github.com/adevress/ROOT into adevress-davix_adev