Replace '_' in paths in werc's docs section with '-', and set up apropriate redirects to avoid broken links.

sites/werc.cat-v.org/docs/user_management.md

@@ -1,36 +0,0 @@
-User and Group Management
-=========================
-
-User account and group membership information are stored under `etc/users/`.
-
-A user account consists of a directory under `etc/users/` that contains files with that users account information, the only required file is `password` containing a password for the user. For example:
-
-	% ls etc/users/
-	eekee  uriel  yosyp
-	% cat etc/users/uriel/password
-	mypass
-
-Users and groups share the same namespace, you can create a group the same way you create a user but instead of a 'password' file adding a 'members' file containing the names of the group members, one per line.
-
-A 'user-group' directory can contain both a password and members file, in which case it will act concurrently as a user and as a group.
-
-The group 'admin' is 'built-in' and any members in that group will have admin privileges for most werc apps by default.
-
-Example
--------
-
-To create a user called [glenda](http://glenda.cat-v.org) that is a member of the group `rabbits` you can do:
-
-	% mkdir etc/users/glenda/
-	% echo carrot > etc/users/glenda/password
-	% mkdir -p etc/users/rabbits
-	% echo glenda >> etc/users/rabbits/members
-
-Utils
------
-
-The script at bin/aux/addwuser.rc allows you to even more trivially add users. 
-
-	addwuser.rc user_name user_pass [groups ...]
-
-