Ensure atomicity for lastsync file

Thanks to wCPO on IRC for making the suggestion!

mentioned in issue arch-mirrors#52 (closed)

added 2 commits

d42dfd49 - Revert "Ignore lastsync.tmp file for syncing"
d6899989 - Ignore lastsync.tmp file for syncing all across

Reverted the previous change and added ignores on all other sections. I was thinking of adding a single exclude at the top but I am guessing the other excludes overwrite the first stated one. If I put it in the right places and there is no cleaner way to do it, that should be it.

added 151 commits

d6899989...d49c0b12 - 150 commits from branch archlinux:master
c24020a2 - Merge branch 'master' of https://gitlab.archlinux.org/archlinux/infrastructure

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added 1 commit

2e3724fc - 1 commit from branch archlinux:master

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added 1 commit

d8337b0f - dbscripts: Ensure atomicity of lastsync file

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I've cleaned up the commits into one more nicer commit. I assume removing mention of "User=ftp" in the systemd service will run systemd service as root by default.