compiler complaints about discarded qualifies may be placated

Author: slact

src/util/nchan_util.c

@@ -329,7 +329,7 @@ int nchan_cstrmatch(char *cstr, ngx_int_t n, ...) {
   return rc;
 }
 
-int nchan_cstr_startswith(char *cstr, char *match) {
+int nchan_cstr_startswith(const char *cstr, const char *match) {
   for(/*void*/; *match != '\0'; cstr++, match++) {
     if(*cstr == '\0' || *cstr != *match)
       return 0;

src/util/nchan_util.h

@@ -20,7 +20,7 @@ ngx_buf_t *nchan_chain_to_single_buffer(ngx_pool_t *pool, ngx_chain_t *chain, si
 ngx_str_t *ngx_http_debug_pool_str(ngx_pool_t *pool);
 int nchan_strmatch(ngx_str_t *val, ngx_int_t n, ...);
 int nchan_cstrmatch(char *cstr, ngx_int_t n, ...);
-int nchan_cstr_startswith(char *cstr, char *match);
+int nchan_cstr_startswith(const char *cstr, const char *match);
 int nchan_str_startswith(ngx_str_t *str, const char *match);
 int nchan_str_after(ngx_str_t **str, const char *match);