New wizard command &R: change the monster spawn rate for the current

level (env.spawn_random_rate).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@7857 c06c8d41-db1a-0410-9941-cceddc491573

Created by  zelgadis  on December 17, 2008
5IWO6LXJBETPTZA7F67UJURUU3FWGFBHRZILC7KQ2KJQSMTIS66AC
Change contents