Do not update timed links and packages index when repo_rsync failed.

Mohammad AlSaleh authored Feb 17, 2016 and Seblu committed May 05, 2017

 pacsort is required to list packages in the right order.

 Example: `agetpkg  -l '^linux$' |tail`

 Before:
 linux 4.3.2-1 x86_64
 linux 4.3.3-1 x86_64
 linux 4.3.3-2 x86_64
 linux 4.3.3-3 x86_64
 linux 4.4.1-1 x86_64
 linux 4.4.1-2 x86_64
 linux 4.4-1 x86_64
 linux 4.4-2 x86_64
 linux 4.4-3 x86_64
 linux 4.4-4 x86_64

 After:
 linux 4.3.2-1 x86_64
 linux 4.3.3-1 x86_64
 linux 4.3.3-2 x86_64
 linux 4.3.3-3 x86_64
 linux 4.4-1 x86_64
 linux 4.4-2 x86_64
 linux 4.4-3 x86_64
 linux 4.4-4 x86_64
 linux 4.4.1-1 x86_64
 linux 4.4.1-2 x86_64

Signed-off-by: Mohammad AlSaleh <CE.Mohammad.AlSaleh@gmail.com>

Reserve the logic of syncing. Now it's a whitelist instead of a blacklist.
This allow us to use kitchensink_tier1 from rsync.al.org to fetch
the source tree, in order to complain with GPLv2 sources distribution.

It may append that rsync stall and don't quit. This add and housekeeper.

- Install in PKGBUILD
- Added in docs
- Get config from /etc/archive.conf

In order to prevent running as root or with different user, which
is complex with a lot of files, check user/group before run.

Since AUR4, rsync access has been deprecated

Do not fail when rsync repositories; try to sync iso and update links, etc.

Also display error message when other rsync call return != 0

Manage sync of repo and iso from the same rsync server

Ship a reference PKGBUILD and related files to quickly setup an archive.

All archiving script are now functions into archive.sh.
Configuration is sourced from a archive.conf file.

iso http sync support was dropped.

this will be used by a future query tool

- prevent $BASE repetition
- use var instead of magic string

you can scan all archived repositories by using -a switch

Usefull in service output

Works need to be done to autodetect last version

Expand code generating package directory to add a all directory with all packages
inside it (without subdir)

The only one is $LAST, because it needs to be updated only when rsync was
successful

Arch Rollback Machine tools has they are