The only difference with csync_s::current is that it's
assigned the value of csync_s::local::type and
csync_s::remote::type, which never change. So might as
well only use the "current" field with constants.
Also move csync_normalize_etag to common/utility since we
don't need the char* function anymore.
Remove the single space file_stat->remotePerm codepath since
this won't be used in csync anymore since
8de3bda0b1.
Issue #1817
This will allow us to unify data structures between csync and libsync.
Utility functions like csync_time and c_std are still compiled as C
since we won't need to be coupled with Qt in the short term.
