Fixed alias in regex locations with limit_except/if. The ngx_http_map_uri_to_path() function used clcf->regex to detect if it's working within a location given by a regular expression and have to replace full URI with alias (instead of a part matching the location prefix). This is incorrect due to clcf->regex being false in implicit locations created by if and limit_except. Fix is to preserve relevant information in clcf->alias instead, by setting it to NGX_MAX_SIZE_T_VALUE if an alias was specified in a regex location.

--- zlib.h	Thu Jul  9 20:06:56 1998
+++ zlib-1.1.3/zlib.h	Tue Mar 22 13:41:04 2005
@@ -709,7 +709,6 @@
    (0 in case of error).
 */
 
-ZEXTERN int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
 /*
      Converts, formats, and writes the args to the compressed file under
    control of the format string, as in fprintf. gzprintf returns the number of