make EAGAIN work for NULL/TRUNC
common getattr for dav_(f)getattr
remove sdata filename
fill_stat_generic
nullpath, consistent error from session, general refactor
Remove unused function file_exists_or_set_null
Merge branch 'master' of github.com:pantheon-systems/fusedav into Mar13EAGAIN
Merge branch 'master' of github.com:pantheon-systems/fusedav into canonicalize_getattr
Merge branch 'master' of github.com:pantheon-systems/fusedav into remove_sdata_filename
Merge branch 'master' of github.com:pantheon-systems/fusedav into fill_stat_generic
Merge branch 'master' of github.com:pantheon-systems/fusedav into Mar18lognullpath
Merge branch 'master' of github.com:pantheon-systems/fusedav into Mar19RemoveUnusedFunction
Merge branch 'master' of github.com:pantheon-systems/fusedav into Mar19RemoveUnusedFunction
Merge branch 'master' of github.com:pantheon-systems/fusedav into canonicalize_getattr
Merge branch 'master' of github.com:pantheon-systems/fusedav into remove_sdata_filename
Merge branch 'master' of github.com:pantheon-systems/fusedav into Mar13EAGAIN
Merge branch 'master' of github.com:pantheon-systems/fusedav into Mar18lognullpath
Merge branch 'master' of github.com:pantheon-systems/fusedav into fill_stat_generic
move session from open to fresh_fd
Merge pull request #34 from pantheon-systems/Mar22Session

move session from open to fresh_fd