fix or complain about some invalid errno references

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@882269 13f79535-47bb-0310-9956-ffa450edef68

modules/http/http_filters.c

@@ -272,7 +272,6 @@ apr_status_t ap_http_filter(ap_filter_t *f, apr_bucket_brigade *b,
             char *endstr;
 
             ctx->state = BODY_LENGTH;
-            errno = 0;
 
             /* Protects against over/underflow, non-digit chars in the
              * string (excluding leading space) (the endstr checks)

modules/proxy/mod_proxy_http.c

@@ -1145,7 +1145,7 @@ skip_body:
     }
 
     if (rv != OK) {
-        /* apr_errno value has been logged in lower level method */
+        /* apr_status_t value has been logged in lower level method */
         ap_log_error(APLOG_MARK, APLOG_ERR, 0, r->server,
                      "proxy: pass request body failed to %pI (%s)"
                      " from %s (%s)",

server/log.c

@@ -494,6 +494,7 @@ int ap_open_logs(apr_pool_t *pconf, apr_pool_t *p /* plog */,
      * because it points to the old error log, or back to the tty
      * of the submitter.
      * XXX: This is BS - /dev/null is non-portable
+     *      errno-as-apr_status_t is also non-portable
      */
     if (replace_stderr && freopen("/dev/null", "w", stderr) == NULL) {
         ap_log_error(APLOG_MARK, APLOG_CRIT, errno, s_main,

support/htcacheclean.c

@@ -342,7 +342,7 @@ static int process_dir(char *path, apr_pool_t *pool)
             }
         }
 
-        /* this may look strange but apr_stat() may return errno which
+        /* this may look strange but apr_stat() may return an error which
          * is system dependent and there may be transient failures,
          * so just blindly retry for a short while
          */