recategorize a couple of todos and unbreak arch_ref64

src/decaf_fast.c

@@ -1497,7 +1497,7 @@ void API_NS(scalar_cond_sel) (
     constant_time_select(out,b,a,sizeof(scalar_t),pick_b);
 }
 
-/* TODO: restore Curve25519 Montgomery ladder? */
+/* FUTURE: restore Curve25519 Montgomery ladder? */
 decaf_error_t API_NS(direct_scalarmul) (
     uint8_t scaled[SER_BYTES],
     const uint8_t base[SER_BYTES],

src/p25519/arch_ref64/f_impl.c

@@ -79,15 +79,15 @@ gf_25519_mulw (
 }
 
 void
-gf_25519_t qr (
+gf_25519_sqr (
     gf_25519_t __restrict__ cs,
     const gf_25519_t as
 ) {
-    gf_25519_mul(cs,as,as); // TODO
+    gf_25519_mul(cs,as,as); // PERF
 }
 
 void
-gf_25519_t trong_reduce (
+gf_25519_strong_reduce (
     gf_25519_t a
 ) {
     uint64_t mask = (1ull<<51)-1;
@@ -128,7 +128,7 @@ gf_25519_t trong_reduce (
 }
 
 void
-gf_25519_t erialize (
+gf_25519_serialize (
     uint8_t serial[32],
     const struct gf_25519_t x
 ) {

src/p448/arch_x86_64/x86-64-arith.h

@@ -7,7 +7,7 @@
 
 #include <stdint.h>
 
-/* TODO: non x86-64 versions of these.
+/* FUTURE: non x86-64 versions of these.
  * FUTURE: autogenerate
  */