• Fixed test errors when running tests as root.
• Made check for util-linux version more robust.
• Added documentation for all fuse capability flags (FUSE_CAP_*) and struct fuse_conn_info fields.
• fuse_loop(), fuse_loop_mt(), fuse_session_loop() and fuse_session_loop_mt() now return more detailed error codes instead of just -1. See the documentation of fuse_session_loop() for details.
• The FUSE main loop is now aborted if the file-system requests capabilities that are not supported by the kernel. In this case, the session loop is exited with a return code of -EPROTO.
• Most file-system capabilities that were opt-in in libfuse2 are now enabled by default. Filesystem developers are encouraged to review the documentation of the FUSE_CAP_* features to ensure that their filesystem is compatible with the new semantics. As before, a particular capability can still be disabled by unsetting the corresponding bit of fuse_conn_info.wants in the init() handler.
• Added FUSE_CAP_PARALLEL_DIROPS and FUSE_CAP_POSIX_ACL, FUSE_HANDLE_KILLPRIV feature flags.
• FUSE filesystems are now responsible for unsetting the setuid/setgid flags when a file is written, truncated, or its owner changed. Previously, this was handled by the kernel but subject to race conditions.
• The allow_other and allow_root mount options (accepted by fuse_session_new()) may now be specified together. In this case, allow_root takes precedence.