Untitled

rewrite         "^/path/([a-zA-Z0-9]+)$"               "/path/$1.shtml"       permanent;
rewrite         "^/path/to/([a-zA-Z0-9]+)\."           "/path/$1.shtml"       permanent;
rewrite         "^/path/([a-zA-Z0-9]+)_ca\."           "/path/$1.shtml"        permanent;