[HowTo] Replace courier with dovecot

[aseques]

Hi, I found that when regenerating the configs there is also the master.cf regenerated and also the main.cf.
To avoid that is as simple as to put prepared templates on the proper places:

/etc/ispcp/postfix/master.cf
/etc/ispcp/postfix/main.cf

Somehow the attachment system is not working for me, so I cannot post the templates until I can put them somewhere (either here or on the wiki)

NOTE: I also updated the wiki so it uses uid 1001 in all the configs