Add cache to g_unix_mount_points_get()
Implement cache for g_unix_mount_points_get() call. Also fix crash on FreeBSD in getfsent() libc function: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250311
Implement cache for g_unix_mount_points_get() call. Also fix crash on FreeBSD in getfsent() libc function: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250311