Remove obsolete ZBX_JAVAGATEWAY_ENABLE variable

ZBX_JAVAGATEWAY_ENABLE is no longer handled by any entrypoint since the
images were migrated to native Zabbix environment variables. The Java
gateway is now configured directly via ZBX_JAVAGATEWAY (JavaGateway) and
ZBX_STARTJAVAPOLLERS (StartJavaPollers).

The obsolete variable was still documented in the server/proxy READMEs and
shipped in the example env files and kubernetes.yaml, where it does nothing.
Worse, the README described it as the way to enable the Java gateway, so a
user setting only ZBX_JAVAGATEWAY_ENABLE=true would get no Java checks.

Remove all remaining references (READMEs, env_vars/.env_srv, env_vars/.env_prx,
kubernetes.yaml). The native ZBX_JAVAGATEWAY / ZBX_STARTJAVAPOLLERS variables
are kept, so existing setups keep working.

Author: saranf

Dockerfiles/proxy-mysql/README.md

@@ -156,10 +156,6 @@ The variable is used to specify debug level. By default, value is ``3``. It is `
 
 The variable is used to specify timeout for processing checks. By default, value is ``4``.
 
-### `ZBX_JAVAGATEWAY_ENABLE`
-
-The variable enable communication with Zabbix Java Gateway to collect Java related checks. By default, value is `false`.
-
 ### Other variables
 
 Additionally the image allows to specify many other environment variables listed below:

Dockerfiles/proxy-sqlite3/README.md

@@ -120,10 +120,6 @@ The variable is used to specify debug level. By default, value is ``3``. It is `
 
 The variable is used to specify timeout for processing checks. By default, value is ``4``.
 
-### `ZBX_JAVAGATEWAY_ENABLE`
-
-The variable enable communication with Zabbix Java Gateway to collect Java related checks. By default, value is `false`.
-
 ### Other variables
 
 Additionally the image allows to specify many other environment variables listed below:

Dockerfiles/server-mysql/README.md

@@ -124,10 +124,6 @@ The variable is used to specify debug level. By default, value is ``3``. It is `
 
 The variable is used to specify timeout for processing checks. By default, value is ``4``.
 
-### `ZBX_JAVAGATEWAY_ENABLE`
-
-The variable enable communication with Zabbix Java Gateway to collect Java related checks. By default, value is `false`.
-
 ### Other variables
 
 Additionally the image allows to specify many other environment variables listed below:

Dockerfiles/server-pgsql/README.md

@@ -125,10 +125,6 @@ The variable is used to specify debug level. By default, value is ``3``. It is `
 
 The variable is used to specify timeout for processing checks. By default, value is ``4``.
 
-### ``ZBX_JAVAGATEWAY_ENABLE``
-
-The variable enable communication with Zabbix Java Gateway to collect Java related checks. By default, value is `false`.
-
 ### Other variables
 
 Additionally the image allows to specify many other environment variables listed below:

env_vars/.env_prx

@@ -30,7 +30,6 @@
 # ZBX_STARTHTTPPOLLERS=1
 # ZBX_STARTSNMPPOLLERS=1 # Available since 7.0.0
 # ZBX_STARTHISTORYPOLLERS=5 # Available since 5.4.0 till 6.0.0
-# ZBX_JAVAGATEWAY_ENABLE=false
 # ZBX_JAVAGATEWAY=zabbix-java-gateway
 # ZBX_JAVAGATEWAYPORT=10052
 # ZBX_STARTJAVAPOLLERS=0

env_vars/.env_srv

@@ -36,7 +36,6 @@ ZBX_NODEADDRESS=zabbix-server:10051 # Available since 6.0.0
 # ZBX_STARTESCALATORS=1
 # ZBX_STARTALERTERS=3 # Available since 3.4.0
 # ZBX_STARTLLDPROCESSORS=2
-ZBX_JAVAGATEWAY_ENABLE=true
 ZBX_JAVAGATEWAY=zabbix-java-gateway
 # ZBX_JAVAGATEWAYPORT=10052
 ZBX_STARTJAVAPOLLERS=5

kubernetes.yaml

@@ -503,8 +503,6 @@ spec:
             value: ""
           - name: ZBX_STARTALERTERS
             value: ""
-          - name: ZBX_JAVAGATEWAY_ENABLE
-            value: "true"
           - name: ZBX_JAVAGATEWAY
             value: "zabbix-java-gateway"
           - name: ZBX_JAVAGATEWAYPORT
@@ -702,8 +700,6 @@ spec:
             value: ""
           - name: ZBX_STARTHTTPPOLLERS
             value: ""
-          - name: ZBX_JAVAGATEWAY_ENABLE
-            value: "true"
           - name: ZBX_JAVAGATEWAY
             value: "zabbix-java-gateway"
           - name: ZBX_JAVAGATEWAYPORT
@@ -896,8 +892,6 @@ spec:
             value: ""
           - name: ZBX_STARTHTTPPOLLERS
             value: ""
-          - name: ZBX_JAVAGATEWAY_ENABLE
-            value: "true"
           - name: ZBX_JAVAGATEWAY
             value: "zabbix-java-gateway"
           - name: ZBX_JAVAGATEWAYPORT