* grub-core/fs/btrfs.c (grub_btrfs_mount): Replace grub_strncmp() with grub_memcmp().
Basic Btrfs support (detection and UUID). * grub-core/fs/btrfs.c: New file. * Makefile.util.def (library): Register btrfs.c. * grub-core/Makefile.core.def: Likewise.