Docs: Update multi-get.asciidoc

Duplicate word

Closes #8228
Introduce ES_USE_IPV4 flag in .bat files

Synchronize the .bat files with the .sh ones by adding ES_USE_IPV4
flag. Higher branches (from 1.4 included) extend this functionality by
introducing elasticsearch.in.bat to mirror elasticsearch.in for *nix
systems.

Relates #8237
Improve handling of multicast binding exceptions

In case the multicast binding fails (due to socket errors), abort zen
pinging code and throw a better error message
Relates #8225
Tests: Removed use of put_alias without an index name

Relates to #7863
Add an inline link referencing directory structure

Adds a link to the directory structure in the sentence that brings up the Linux package/RPM.

- Fixes some minor grammar issues (e.g., capitalization).
[ENGINE] Add current translog ID to commit meta before closing

Today we simply close the IW when we have to open a new one if ie.
we change merge settings. Yet, the API is deprecated and under the hood
it commits the IW. For safety we should add the current translog ID and
use rollback instead to not wait for merges.
s/MapBuilder/singletonMap in InternalEngine
Update clearcache.asciidoc

Typo fixed
Test: fix test to optimize and flush in the end to try to prevent 'Delete Index failed - not acked'
Completion Suggester: Fix CompletionFieldMapper to correctly parse weight
 - Allows weight to be defined as a string representation of a positive integer

closes #8090
[TEST] Prevent relocations during peer recovery tests
[SCRIPTS] GetIndexedScript call can deadlock

GetIndexedScript can deadlock since they perform blocking operation
on the network thread. This commit moves the blocking to an async operation
Bind each AllocationDecider as a singleton
Update source-field.asciidoc

very minor typofix

Closes #8066
Docs: Update getting-started.asciidoc

Closes #8194
Docs: Update getting-started.asciidoc

Closes #8195
Logs: Change log level for mpercolate

When using _mpercolate API we log by default a lot of DEBUG `Percolate shard response`.
They should be in TRACE level instead of DEBUG.

(cherry picked from commit 5bd720b)
Docs: Document action.replication_type setting

Document action.replication_type setting

Closes #8290
Use a 1024 byte minimum weight for filter cache entries

This changes the weighing function for the filter cache to use a
configurable minimum weight for each filter cached. This value defaults
to 1kb and can be configured with the
`indices.cache.filter.minimum_entry_weight` setting.

This also fixes an issue with the filter cache where the concurrency
level of the cache was exposed as a setting, but not used in cache
construction.

Relates to #8268

Conflicts:
	src/main/java/org/elasticsearch/indices/cache/filter/IndicesFilterCache.java
Update search-template.asciidoc

Fixed asciidoc typo