fuse: Add CAP_{ABORT_ERROR,MAX_PAGES,CACHE_SYMLINKS,NO_OPENDIR_SUPPORT}

The first 3 are present since

CAP_ABORT_ERROR is present since Linux 4.17:

	https://git.kernel.org/linus/3b7008b226

CAP_MAX_PAGES & CAP_CACHE_SYMLINKS are present since Linux 4.20:

	https://git.kernel.org/linus/5da784cce4
	https://git.kernel.org/linus/5571f1e654

CAP_NO_OPENDIR_SUPPORT will be present in Linux 5.1:

	https://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git/commit?id=d9a9ea94f7

fuse/print.go

@@ -49,6 +49,10 @@ func init() {
 		CAP_PARALLEL_DIROPS:    "PARALLEL_DIROPS",
 		CAP_POSIX_ACL:          "POSIX_ACL",
 		CAP_HANDLE_KILLPRIV:    "HANDLE_KILLPRIV",
+		CAP_ABORT_ERROR:        "ABORT_ERROR",
+		CAP_MAX_PAGES:          "MAX_PAGES",
+		CAP_CACHE_SYMLINKS:     "CACHE_SYMLINKS",
+		CAP_NO_OPENDIR_SUPPORT: "NO_OPENDIR_SUPPORT",
 	}
 	releaseFlagNames = map[int64]string{
 		RELEASE_FLUSH: "FLUSH",

fuse/types.go

@@ -278,6 +278,10 @@ const (
 	CAP_PARALLEL_DIROPS    = (1 << 18)
 	CAP_HANDLE_KILLPRIV    = (1 << 19)
 	CAP_POSIX_ACL          = (1 << 20)
+	CAP_ABORT_ERROR        = (1 << 21)
+	CAP_MAX_PAGES          = (1 << 22)
+	CAP_CACHE_SYMLINKS     = (1 << 23)
+	CAP_NO_OPENDIR_SUPPORT = (1 << 24)
 )
 
 type InitIn struct {