Explain why some abort() calls are still around

src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c

@@ -354,7 +354,7 @@ randombytes_salsa20_random_stir(void)
 #endif
     if (crypto_generichash(stream.key, sizeof stream.key, k0, sizeof_k0,
                            hsigma, sizeof hsigma) != 0) {
-        abort(); /* LCOV_EXCL_LINE */
+        abort(); /* really abort -- it should never happen */ /* LCOV_EXCL_LINE */
     }
     COMPILER_ASSERT(sizeof stream.key <= sizeof m0);
     randombytes_salsa20_random_rekey(m0);

src/libsodium/sodium/utils.c

@@ -481,7 +481,7 @@ _out_of_bounds(void)
 # elif defined(SIGKILL)
     raise(SIGKILL);
 # endif
-    abort();
+    abort(); /* not something we want any higher-level API to catch */
 } /* LCOV_EXCL_LINE */
 
 static inline size_t