multiline_options: Split up, even more, the multiline option sections, corrected scope info of multi-line-timeout(), added the description of the new empty-line-separated multi-line-mode()

Signed-off-by: Hofi <hofione@gmail.com>

Author: HofiOne

_includes/doc/admin-guide/examples/multi-line.md

@@ -1,6 +1,6 @@
 >**TIP:** To format multi-line messages to your individual needs, consider
 >the following:
->  
+>
 >- To make multi-line messages more readable when written to a file,
 >    use a template in the destination and instead of the ${MESSAGE}
 >    macro, use the following: **$(indent-multi-line ${MESSAGE})**.
@@ -14,12 +14,6 @@
 >            template("${ISODATE} ${HOST} $(indent-multi-line ${MESSAGE})\n")
 >        );
 >    };
->    ```
->  
+>    ```  
+>For details on using templates, see Templates and macros.
 {: .notice--info}
-
-For details on using templates, see Templates and macros.
-
-- To actually convert the lines of multi-line messages to single line
-    (by replacing the newline characters with whitespaces), use the
-    **flags(no-multi-line)** option in the source.

_includes/doc/admin-guide/options/multi-line-mode-empty-line-separated.md

@@ -0,0 +1 @@
+- The *empty-line-separated* mode, as its name suggests, reads and treats all messages as one till it receives an empty line (which contains only a \r, \n or \r\n sequence).

_includes/doc/admin-guide/options/multi-line-mode-footer.md

@@ -0,0 +1,2 @@
+>**TIP:** To actually convert the lines of multi-line messages to single line (by replacing the newline characters with whitespaces), use the **flags(no-multi-line)** option in the source.
+{: .notice--info}

_includes/doc/admin-guide/options/multi-line-mode-header.md

@@ -0,0 +1,8 @@
+## multi-line-mode()
+
+| Type:  |  indented \| regexp \| empty-line-separated |
+|Default: |  empty string|
+
+*Description:* Use the multi-line-mode() option when processing
+multi-line messages. The {{ site.product.short_name }} application provides the
+following methods to process multi-line messages:

_includes/doc/admin-guide/options/multi-line-mode-network-header.md

@@ -0,0 +1,8 @@
+## multi-line-mode()
+
+| Type:  |  empty-line-separated |
+|Default: |  empty string|
+
+*Description:* Use the multi-line-mode() option when processing
+multi-line messages. For this source the {{ site.product.short_name }} application provides only the
+`empty-line-separated` following method currently to process multi-line messages:

_includes/doc/admin-guide/options/multi-line-mode-network.md

@@ -0,0 +1,5 @@
+{% include doc/admin-guide/options/multi-line-mode-network-header.md %}
+
+{% include doc/admin-guide/options/multi-line-mode-empty-line-separated.md %}
+
+{% include doc/admin-guide/options/multi-line-mode-footer.md %}

_includes/doc/admin-guide/options/multi-line-mode.md

@@ -1,11 +1,4 @@
-## multi-line-mode()
-
-| Type:  |  indented \| regexp|
-|Default: |  empty string|
-
-*Description:* Use the multi-line-mode() option when processing
-multi-line messages. The {{ site.product.short_name }} application provides the
-following methods to process multi-line messages:
+{% include doc/admin-guide/options/multi-line-mode-header.md %}
 
 - The *indented* mode can process messages where each line that
     belongs to the previous line is indented by whitespace, and the
@@ -29,7 +22,7 @@ following methods to process multi-line messages:
     multi-line-mode(prefix-garbage), see the multi-line-prefix() and
     multi-line-garbage() options.
 
-- The prefix-suffix mode uses a string or regular expression (set in
+- The *prefix-suffix* mode uses a string or regular expression (set in
     multi-line-prefix()) that matches the beginning of the log messages,
     ignores newline characters from the source until a line matches the
     regular expression set in multi-line-suffix(), and treats the lines
@@ -43,4 +36,8 @@ following methods to process multi-line messages:
     The prefix-suffix mode is similar to the prefix-garbage mode, but it
     appends the garbage part to the message instead of discarding it.
 
+{% include doc/admin-guide/options/multi-line-mode-empty-line-separated.md %}
+
 {% include doc/admin-guide/examples/multi-line.md %}
+
+{% include doc/admin-guide/options/multi-line-mode-footer.md %}

_includes/doc/admin-guide/options/multi-line-prefix.md

@@ -13,8 +13,6 @@ multi-line messages. If the multi-line-prefix() option is set, {{ site.product.s
 regular expression again, and treats the lines between the matching
 lines as a single message. See also the multi-line-garbage() option.
 
-{% include doc/admin-guide/examples/multi-line.md %}
-
 ### Example: Processing Tomcat logs
 
 The log messages of the Apache Tomcat server are a typical example for

_includes/doc/admin-guide/options/multi-line-timeout.md

@@ -23,3 +23,6 @@ source s_multi {
 ```
 
 For more details see the blog post Multi-line-timeout: making sure your last multi-line message is not lost.
+
+>**NOTE:** This option has effect only if the file follow mode is `syslog-ng poll`, `follow-freq()` > 0. For details of file follow modes, refer to How content changes are followed in file() and wildcard-file() sources.
+{: .notice--info}

doc/_admin-guide/060_Sources/005_Default-network-drivers/000_Default-network-drivers_options.md

@@ -18,6 +18,8 @@ The default-network-drivers() source has the following options.
 
 {% include doc/admin-guide/options/max-connections.md %}
 
+{% include doc/admin-guide/options/multi-line-mode-network.md %}
+
 ## rfc5424-tcp-port()
 
 |  Type:|      number|