[mod_auth] terminate salt for CRYPT-MD5-NTLM

src/mod_authn_file.c

@@ -686,6 +686,7 @@ static handler_t mod_authn_file_htpasswd_basic(server *srv, connection *con, voi
                     /*(reuse sample buffer for salt  (FYI: expect slen == 8))*/
                     memcpy(sample, CONST_STR_LEN("$1$"));
                     memcpy(sample+sizeof("$1$")-1, b, slen);
+                    sample[sizeof("$1$")-1+slen] = '\0';
                    #if defined(HAVE_CRYPT_R)
                     crypted = crypt_r(ntlmhex, sample, &crypt_tmp_data);
                    #else