reference: Fix typos and link in Structure types section

Author: Ulrik Sverdrup

src/doc/reference.md

@@ -3491,7 +3491,7 @@ to an array or slice is always bounds-checked.
 A `struct` *type* is a heterogeneous product of other types, called the
 *fields* of the type.[^structtype]
 
-[^structtype]: `struct` types are analogous `struct` types in C,
+[^structtype]: `struct` types are analogous to `struct` types in C,
     the *record* types of the ML family,
     or the *structure* types of the Lisp family.
 
@@ -3505,7 +3505,7 @@ a corresponding struct *expression*; the resulting `struct` value will always
 have the same memory layout.
 
 The fields of a `struct` may be qualified by [visibility
-modifiers](#re-exporting-and-visibility), to allow access to data in a
+modifiers](#visibility-and-privacy), to allow access to data in a
 structure outside a module.
 
 A _tuple struct_ type is just like a structure type, except that the fields are