Update redirects base for subdomain consolidation (#70)

Also removes the symlink line as symlinks don't do anything in Snooty-built repos.

Author: schmalliso

config/redirects

@@ -1,6 +1,5 @@
-define: base https://docs.mongodb.com/database-tools
+define: base https://www.mongodb.com/docs/database-tools
 define: versions master 100
 
 # raw: <source file> -> ${base}/<destination>
 
-symlink: 100 -> master