Move x509_name_cmp() from x509_crt.c to x509.c
This is to prepare a subsequent rewrite of `x509_name_cmp()` in terms
of the X.509 name traversal helper `x509_set_sequence_iterate()`
from `x509.c`.
diff --git a/include/mbedtls/x509.h b/include/mbedtls/x509.h
index 6a6fd02..e6781b6 100644
--- a/include/mbedtls/x509.h
+++ b/include/mbedtls/x509.h
@@ -303,6 +303,9 @@
mbedtls_x509_time *t );
int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end,
mbedtls_x509_buf *serial );
+int mbedtls_x509_name_cmp( const mbedtls_x509_name *a,
+ const mbedtls_x509_name *b );
+int mbedtls_x509_memcasecmp( const void *s1, const void *s2, size_t len );
int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end,
mbedtls_x509_buf *ext, int tag );