Small change to warn about symlinks pointing outside of a backup

docs/man/borg-mount.1

@@ -45,6 +45,11 @@ When mounting a repository, the top directories will be named like the
 archives and the directory structure below these will be loaded on\-demand from
 the repository when entering these directories, so expect some delay.
 .sp
+Care should be taken, as borg will backup symlinks as is,
+and when having mounted an archive or repository,
+it is possible to "jump" out of the mountpoint by following a symlink.
+As of version 1.4.4 borg will print a warning when mounting for this reason.
+.sp
 Unless the \fB\-\-foreground\fP option is given the command will run in the
 background until the filesystem is \fBunmounted\fP\&.
 .sp

src/borg/fuse.py

@@ -567,6 +567,7 @@ def pop_option(options, key, present, not_present, wanted_type, int_base=0):
                                 user=dir_user, group=dir_group, uid=dir_uid, gid=dir_gid)
         self._create_filesystem()
         llfuse.init(self, mountpoint, options)
+        logger.warning('ATTENTION: The mounted archive may contain symlinks that point outside the archive tree. \nWhen following such symlinks you may see files within the mountpoint that are not part of the archive, \nor different versions of files than those stored in the archive.')
         if not foreground:
             if isinstance(self.repository_uncached, RemoteRepository):
                 daemonize()