update gitignore

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

.gitignore

@@ -1,6 +1,17 @@
 local.mak
 /target
 **/*.rs.bk
+*~
+*.backup
+*.backup[0-9]
+*.backup[0-9][0-9]
+*.old
+*.old[0-9]
+*.old[0-9][0-9]
+*.5
+*.7
+*.html
+__pycache__/
 /etc/proxmox-backup.service
 /etc/proxmox-backup-proxy.service
 build/