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>

include/internal/err.h

@@ -58,7 +58,7 @@
 #ifndef INTERNAL_ERR_H
 # define INTERNAL_ERR_H
 
-void int_err_load_crypto_strings(void);
-void int_err_free_strings(void);
+void err_load_crypto_strings_int(void);
+void err_free_strings_int(void);
 
 #endif