Refactor EGD conditional support

As per Jeremy's request in #124
Windows does not define HAVE_RAND_EGD resulting in the same conditional
support for EGD.

lib/hcrypto/rand-fortuna.c

@@ -486,7 +486,7 @@ fortuna_reseed(void)
 	entropy_p = 1;
     }
 #endif
-#if !defined(NO_RAND_EGD_METHOD) && defined(HAVE_RAND_EGD)
+#if defined(HAVE_RAND_EGD)
     /*
      * Only to get egd entropy if /dev/random or arc4rand failed since
      * it can be horribly slow to generate new bits.

lib/hcrypto/test_rand.c

@@ -125,7 +125,7 @@ main(int argc, char **argv)
 	else if (strcasecmp(rand_method, "unix") == 0)
 	    RAND_set_rand_method(RAND_unix_method());
 #endif
-#if !defined(NO_RAND_EGD_METHOD) && defined(HAVE_RAND_EGD)
+#if defined(HAVE_RAND_EGD)
 	else if (strcasecmp(rand_method, "egd") == 0)
 	    RAND_set_rand_method(RAND_egd_method());
 #endif

lib/krb5/crypto-rand.c

@@ -67,7 +67,7 @@ seed_something(void)
     /* Calling RAND_status() will try to use /dev/urandom if it exists so
        we do not have to deal with it. */
     if (RAND_status() != 1) {
-#if !defined(NO_RAND_EGD_METHOD) && defined(HAVE_RAND_EGD)
+#if defined(HAVE_RAND_EGD)
 	krb5_context context;
 	const char *p;