Fix propagation of fancyindex_css_href configuration directive

The value for fancyindex_css_href was not being propagated properly, so
overriding its value did not work as expected. For example the following
configuration:

    http {
	# ...
	fancyindex_css_href "/css/global.css";

	location /subdir/ {
	    fancyindex_css_href "/css/local.css";
	}
    }

would always use "global.css", even when accessing file listings under
"/subdir".

This patch fixes the issue.

CHANGELOG.md

@@ -12,6 +12,9 @@ All notable changes to this project will be documented in this file.
 ### Changed
 - Listings in top-level directories will not generate a "Parent Directory"
   link as first element of the listing. (Patch by Thomas P.)
+### Fixed
+- Fix propagation and overriding of the `fancyindex_css_href` setting inside
+  nested locations.
 
 
 ### Added

ngx_http_fancyindex_module.c

@@ -1334,7 +1334,8 @@ ngx_http_fancyindex_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
 
     ngx_conf_merge_str_value(conf->header, prev->header, "");
     ngx_conf_merge_str_value(conf->footer, prev->footer, "");
-    ngx_conf_merge_str_value(conf->time_format, prev->time_format, "%Y-%b-%d %H:%S");
+    ngx_conf_merge_str_value(conf->css_href, prev->css_href, "");
+    ngx_conf_merge_str_value(conf->time_format, prev->time_format, "%Y-%b-%d %H:%M");
 
     ngx_conf_merge_ptr_value(conf->ignore, prev->ignore, NULL);
     ngx_conf_merge_value(conf->hide_symlinks, prev->hide_symlinks, 0);