mongodb3: updated to 3.4.21

3.4.21:
Issues fixed:
SERVER-39820: Add the client IP address to the successful authentication log message
SERVER-41213: Unique background index builds may produce inconsistent keys
SERVER-37765: Platform Support: Remove Ubuntu 14.04
SERVER-37774: Platform Support: Remove Enterprise Ubuntu 16.04 PPCLE
WT-4615: Sync backup file before returning backup cursor

3.4.20:
Issues fixed:
SERVER-39166: $graphLookup should force a pipeline to split in sharded cluster
SERVER-39723: Change listIndexes command behavior to show in-progress index builds
TOOLS-2158: mongodump failing on Windows with 窶彳rror opening system CA store: Access is denied.窶�

3.4.19:
Issues fixed:
SERVER-18985: setParameter should log at level 0
SERVER-22766: Dynamic oplog sizing for WiredTiger nodes
SERVER-33469: Make syslog log lines consistent with mongod log lines
SERVER-37132: Negation of $in with regex can incorrectly plan from the cache, leading to missing query results
SERVER-37182: Different values when referencing whole object vs. a field of that object after $arrayToObject
SERVER-37616: Implement tuneable batch size for the rangedeleter

3.4.18:
Issues fixed:
SERVER-25175: listIndexes shouldn窶冲 include in-progress background indexes
SERVER-35418: Allow specifying CAs for incoming and outgoing connections separately.
SERVER-36944: applyOps does not permit unknown field names when creating a v:1 index.
SERVER-37058: Update with numeric field names inside an array can cause validation to fail.

3.4.17:
Issues fixed:
SERVER-33857 Missing log redaction due to confusion with Command::redactForLogging().
SERVER-34846 Covered index with collated field returns incorrect result when collation not involved in match or sort.
SERVER-36010 Change log messages for Windows stacktraces to use error() or severe() rather than log().
SERVER-34558: Add SSL_version to client metadata logging.

3.4.16:
Issues fixed:
SERVER-32999: Platform Support: Remove Debian 7 builds.
SERVER-29301: Upgrade MozJS to ESR 45.9.0
SERVER-5461: Add syncSourceHost field to replSetGetStatus output.

3.4.15:
Issues fixed:
SERVER-31535: Platform Support: remove Ubuntu 12.04 builds.
SERVER-32923: Platform Support: remove SLES11 builds.
SERVER-20056: Log a startup warning if wiredTigerCacheSizeGB is > 80% of RAM.
SERVER-28981: Sharding balancer prefers shards in a specific order when moving chunks.

3.4.14:
Issues fixed:
SERVER-28151: Authentication database should be synced first during an initial sync.
SERVER-32886: Unnecessary sleeps during chunk migration.
SERVER-32933: Allow mongod to start when unable to reach LDAP server.

3.4.13:
Issues fixed:
SERVER-33238: Prevent WiredTiger read ticket count from going negative.

3.4.12:
Issues fixed:
SERVER-31437: Fix parsing of mongo host/db connect string.
SERVER-32875: Don窶冲 stall ftdc due to running out of tickets.
SERVER-33089: Unable to start queryable mongod because it failed to regenerate index for admin.system.users.

3.4.11:
Issues fixed:
SERVER-19605: Oplog timeout should be configurable.
SERVER-19919: Chunks that exceed 250000 docs but are under half chunk size get marked as jumbo.
SERVER-29293: Recipient shard fails to abort migration on stepdown.
SERVER-32001: unindexing a key in a partial unique index may cause server crash

3.4.10:
Issues fixed:
SERVER-15723: Avoid G_X lock for rename_collection within database
SERVER-31049: View with collation doesn窶冲 work as expected in sharded cluster
SERVER-29287: Upgrade pcre to 8.41
SERVER-31204: Calling shardCollection after enableSharding may fail if executed against different mongos

3.4.9:
Issues fixed:
SERVER-20392: Sharding an existing small collection results in large number of chunks
SERVER-30189: Reduce calls to allocator for large $in expressions
SERVER-30487: RangeDeleter holds WT transaction open while waiting for majority
SERVER-30636: Range deleter assert failed because of replication lag

3.4.7:
Issues fixed:
SERVER-29282: BSON Document Size can be exceeded when grouping inserts on SECONDARY nodes
SERVER-29568: Enable configuration of OpenSSL cipher suite via setParameter
SERVER-29817: Optimize incremental update performance of ChunkManager and CollectionMetadata

3.4.6:
Issues fixed:
SERVER-27347: Only close idle cached cursors on the WiredTiger ident that is busy.
SERVER-29618: $geoWithin in aggregation pipeline after $lookup and $unwind returns incorrect results.
WT-3362: Cursor opens should never block for the duration of a checkpoint.

3.4.5:
Issues fixed:
SERVER-28952: Multikey indexes should not be eligible for DISTINCT_SCAN if distinct key is an array component.
SERVER-28427: GlobalLock with timeout can still block indefinitely.
SERVER-29018 mongos can segfault in getMore on views with find batchSize of 0.

(adam)