..F....PS. [ZBXNEXT-435] add Oracle TNSNAMES connect support (mgrigorev)
...G...... [ZBXNEXT-1302] added low-level discovery of block devices (asestakovs)
..F....... [ZBXNEXT-1456] added filter by item discovery status for item configuration view; thanks to Volker Fröhlich for the original patch (Alexei)
..F....PS. [ZBXNEXT-2315] implemented content matching in web monitoring headers (talbergs, vso)
...GI..PS. [ZBXNEXT-4577] improved performance of Zabbix server by replacing semaphores to pthread mutexes and read-write locks (vso, wiper)
.......PS. [ZBXNEXT-4757] added support of "pused" mode for cache-related internal items (Sasha)
...G...... [ZBXNEXT-4967] added Zabbix sender data sending to multiple destinations given in ServerActive configuration parameter (viktors)
...G...PS. [ZBXNEXT-5179] added option to specify absolute path in LoadModule; thanks to Glebs Ivanovskis for the patch (asestakovs)
...G...... [ZBXNEXT-1567] added item "vfs.dir.count" for counting directory entries (valdis)
...G...... [ZBX-14876] added a new optional parameter <regex_excl_dir> to items vfs.dir.size[] and vfs.dir.count[] (viktors)

.......PS. [ZBXNEXT-4941] changed overflow statements to execute one by one for Oracle for better performance (kalimulin)
........S. [ZBX-7798] improved performance of icmpping* for fping v4.0 and more (MVekslers)
...G...PS. [ZBX-9867] improved Zabbix daemon termination by not using signal unsafe functions in signal handler; improved Zabbix server and Zabbix proxy process termination by stopping data collection and waiting for history syncers to finish (vso)
...G...... [ZBX-11970] fixed style for some enumerators and structure type declarations (abs, Andris)
...G....S. [ZBX-12671] refactoring the code base to support the compiler flag -Wstrict-prototypes
...G...PS. [ZBX-12983] fixed compilation warnings under Windows (valdis)
.......PS. [ZBX-13186] Show discovery error "Value should be a JSON object" in zabbix log file
A......... [ZBX-13266] improved performance of the SQL queries with lot of IDs in the condition (Sasha)
...G...... [ZBX-14624] fixed agent collector not releasing connection to missing/removed disk devices (Andris, yurii)
.......PS. [ZBX-14853] fixed error of vmware items caused by misconfigured vmware maxQueryMetrics parameter (MVekslers)
...G...... [ZBX-15225] improved handling of timeouts in "vfs.dir.size" and "vfs.dir.count" items on Windows agent (asitals)
...G...PS. [ZBX-15552] fixed compilation with LibreSSL as OpenSSL replacement and OpenSSL without PSK support (Andris)
..F....... [ZBX-15609] added missing optional parameter "<regex_excl_dir>" for "vfs.dir.count" and "vfs.dir.size" item keys in item helper (Ivo)
...G...... [ZBX-15898] fixed compilation warning regarding too large integer constant (akozlovs)
...G...... [ZBX-15915] fixed linking error if round() is undefined (akozlovs)
...G...PS. [ZBX-15955] fixed security vulnerability - accepting connections from not allowed addresses (Andris, vso)
...G...... [ZBX-15962] added mounted filesystems to vfs.fs.discovery of windows agent (asestakovs)
...G...... [ZBX-16096] fixed "system.cpu.util" reporting incorrect CPU utilisation due to guest time sometimes not being fully included in user time by "/proc/stat" (vso)
...G...PS. [ZBX-16103] reduced PCRE recursion limit (asestakovs)
.......PS. [ZBX-16166] fixed Zabbix fping feature detection does not work with fping builds since 10 Feb 2017 (akozlovs)
...G...... [ZBX-16218] fixed zabbix_sender does not clean up its semaphores (akozlovs)
...G...PS. [ZBX-16239] fixed compilation warining related to prototypes of module API functions (viktors)
.......PS. [ZBX-16256] eliminated possible infinite fetch loop with OracleDB (viktors)
.......PS. [ZBX-16270] fixed memory leak in IPC service when queueing multiple messages to client (akozlovs)
....I..... [ZBX-16277] fixed compilation Zabbix agent for Windows with options available for Windows Vista and newer (MVekslers)
........S. [ZBX-16315] fixed Zabbix server not to cause foreign key constraint failure on Zabbix proxy when changing and sending configuration at the same time (vso)
.......PS. [ZBX-16346] fixed compilation for Oracle Instant Client v18.5 and higher (asestakovs)
...G...PS. [ZBX-16460] fixed Zabbix daemon termination on FreeBSD (vso)
...G...PS. [ZBX-16545] fixed shell script execution timeout log message (atumilovics)
...G...... [ZBX-16612] fixed possibility of high CPU usage on Windows (vso)
........S. [ZBX-16677] fixed empty sql query DBexecute_overflowed_sql call during host availability update (atumilovics)
...G...... [ZBX-16680] fixed freeing locked resources when Zabbix agent cannot be started and has to exit with failure
........S. [ZBX-16683] fixed race condition between history syncer and escalator that caused recovery operations being delayed by step duration (vso)
...G....S. [DEV-732] fixed warnings reported by cppcheck static analysis; updated "cppcheck-static-analysis" targer in backend-build Jenkins job
...G...... [DEV-698] removed unused local variables
........S. [DBS-001] fixed format string is defined in proxy_tasks.c and timer.c (mgrigorev)