Remove bogus SCRAM_ITERATION_LEN constant.

It was not used for what the comment claimed, at all. It was actually used
as the 'base' argument to strtol(), when reading the iteration count. We
don't need a constant for base-10, so remove it.

src/backend/libpq/auth-scram.c

@@ -476,7 +476,7 @@ parse_scram_verifier(const char *verifier, char **salt, int *iterations,
 	if ((p = strtok(NULL, ":")) == NULL)
 		goto invalid_verifier;
 	errno = 0;
-	*iterations = strtol(p, &p, SCRAM_ITERATION_LEN);
+	*iterations = strtol(p, &p, 10);
 	if (*p || errno != 0)
 		goto invalid_verifier;
 

src/include/common/scram-common.h

@@ -31,9 +31,6 @@
 /* length of salt when generating new verifiers */
 #define SCRAM_SALT_LEN				10
 
-/* number of bytes used when sending iteration number during exchange */
-#define SCRAM_ITERATION_LEN			10
-
 /* default number of iterations when generating verifier */
 #define SCRAM_ITERATIONS_DEFAULT	4096
 

src/interfaces/libpq/fe-auth-scram.c

@@ -444,7 +444,7 @@ read_server_first_message(fe_scram_state *state, char *input,
 		/* read_attr_value() has generated an error string */
 		return false;
 	}
-	state->iterations = strtol(iterations_str, &endptr, SCRAM_ITERATION_LEN);
+	state->iterations = strtol(iterations_str, &endptr, 10);
 	if (*endptr != '\0' || state->iterations < 1)
 	{
 		printfPQExpBuffer(errormessage,