Updating Osmium

Fetch the latest version, but don't change any local files yet:
```
git fetch origin
```
Read the latest UPDATING for any special updating instructions. Some updates may require special interventions, and it is crucial that you read this file before doing anything.
```
git show origin/production:UPDATING
```
Stop your webserver and backup your database:
```
(stop webserver)
./bin/backup_osmium
```

Merge the latest version:

git merge origin/production
git submodule init
git submodule update

If UPDATING says that the eve schema has been updated, do the steps in the "Updating the eve schema" section below.
If UPDATING says that the osmium schema has been updated, do the steps in the "Updating the osmium schema" section below.
Make sure that everything is in working order:
```
./bin/sanity_check
```
Clear cache:
```
make clear-harmless-cache
```
Start your webserver and test the changes. You may want to only allow your IP address to access the server during that period.

Updating the `eve` schema/data

Drop the two schemas:

DROP SCHEMA osmium CASCADE;
DROP SCHEMA eve CASCADE;

Redo step 1 and 2 of the initial database setup section (see README-Install.md).

Restore the osmium schema.

pg_restore -j 8 -d osmium -U osmium_user pgsql/osmium-full-XXXXX.pgsql

Wipe all Sphinx indexes and redo the initial Sphinx setup (see README-Install.md).

Backup the osmium schema (bin/backup_osmium). This step isn't strictly necessary, but it will allow you to restore a working data set if the database patches fail.
Apply all the database patches for the version you are upgrading from (if you skipped multiple versions, use all patches in versions greater or equal than the version you are upgrading from):
```
cat pgsql/patches/<previous_version>/*.sql | psql osmium osmium_user
```
Wipe all Sphinx indexes and redo the initial Sphinx setup (see README-Install.md).