dwarves don't make them, orc monsters don't get them, and they don't seem to fit orcs.

Rationale: They're described as "farming implements usually unsuited to combat." Given orcs' aptitude for combat, they'd use a weapon suited to combat in such circumstances. Also, it's the only slicing polearm, and, given the polearms that orc knights and warlords can get, they prefer the chopping ones.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@3065 c06c8d41-db1a-0410-9941-cceddc491573