Add mail stuff, probably update for focal

dots/.offlineimaprc

@@ -0,0 +1,23 @@
+[general]
+accounts = Gmail
+maxsyncaccounts = 1
+
+[Account Gmail]
+localrepository = LocalGmail
+remoterepository = RepositoryGmail
+autorefresh = 5
+quick = 10
+postsynchook = mu index --maildir ~/Maildir
+
+[Repository LocalGmail]
+type = Maildir
+localfolders = ~/Maildir/Gmail
+
+[Repository RepositoryGmail]
+type = Gmail
+maxconnections = 2
+remoteuser = eheu48
+remotepass = # to be added
+folderfilter = lambda foldername: foldername not in ['[Gmail]/All Mail', '[Gmail]/Important', '[Gmail]/Tous les messages', '[Gmail]/Spam']
+sslcacertfile = /etc/ssl/certs/ca-certificates.crt
+# sslcacertfile = OS-DEFAULT