Rename int_*() functions to *_int()

There is a preference for suffixes to indicate that a function is internal
rather than prefixes. Note: the suffix is only required to disambiguate
internal functions and public symbols with the same name (but different
case)

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/crypto/err/err.c b/crypto/err/err.c
index bb9d5c9..3ee4e86 100644
--- a/crypto/err/err.c
+++ b/crypto/err/err.c
@@ -447,7 +447,7 @@
     CRYPTO_THREAD_unlock(err_string_lock);
 }
 
-void int_err_free_strings(void)
+void err_free_strings_int(void)
 {
     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);