Amazon S3 doc fixups (#159)

 - modified heading sizes
 - modified default for compresslevel()
 - modified default for chunk-size() and stated minimum size
 - modified url scheme condition
 - corrected missing product name variables
 - corrected type for max-object-size()

Author: mrgarris0n

doc/_admin-guide/070_Destinations/225_Amazon-s3/000_amazon_s3_options.md

@@ -7,22 +7,22 @@ description: >-
 
 The following options are specific to the s3 destination.
 
-### access-key()
+## access-key()
 
 |Type:|   string|
 |Default:|           N/A|
 
 *Description:* The `ACCESS_KEY` of the service account of the S3 bucket. (Used together with secret-key().)
 
-### bucket()
+## bucket()
 
 |Type:|   string|
 |Default:|           N/A|
 
 *Description:* The name of the S3 bucket.
 For example: `my-bucket`.
 
-### canned-acl()
+## canned-acl()
 
 |Type:|   string|
 |Default:|           N/A|
@@ -34,46 +34,44 @@ For example: `my-bucket`.
 
 If an invalid value is configured, the default is used.
 
-### chunk-size()
+## chunk-size()
 
 |Type:|   string|
-|Default:|           N/A|
+|Default:|           5 MiB|
 
-*Description:* The size of log messages written by syslog-n OSE to the S3 object in a batch. If compression is enabled, the chunk-size() specifies the compressed size.
+*Description:* The size of log messages written by {{ site.product.short_name }} to the S3 object in a batch. If compression is enabled, the chunk-size() specifies the compressed size. Must be set to at least 5 MiB.
 
-### compression()
+## compression()
 
 |Type:|   boolean|
 |Default:|           no|
 
 *Description:* Setting compression to `yes` enables gzip compression, and implicitly adds a `.gz` suffix to the created object’s key. You can set the level of the compression using the compresslevel() option (`0-9`).
 
-### compresslevel() 
+## compresslevel()
 
 |Type:|   integer|
-|Default:|           0-9|
+|Default:|           9|
 
 Description: Only has effect if compression() is set to `yes`. The level of the compression can be set using the compresslevel() option (`0-9`).
 
+## flush-grace-period()
 
-### flush-grace-period()
-
-|Type:|   integer[minutes]|
+|Type:|   integer [minutes]|
 |Default:|           60|
 
 *Description:* After the grace period expires and no new messages are routed to the destination, {{ site.product.short_name }} flushes the contents of the buffer to the S3 object even if the volume of the messages in the buffer is lower than chunk-size().
 
-#{% include doc/admin-guide/options/log-fifo-size.md %}
+{% include doc/admin-guide/options/log-fifo-size.md %}
 
-### max-object-size()
+## max-object-size()
 
-|Type:|   number [GiB]|
+|Type:|   string|
 |Default:|           5120GiB|
 
 *Description:* The maximal size of the S3 object. If an object reaches this size, {{ site.product.short_name }} appends an index suffix ("-1", “-2”, …) to the object key and starts a new object after rotation.
 
-### max-pending-uploads()
-
+## max-pending-uploads()
 
 |Type:|   integer|
 |Default:|           32|
@@ -83,38 +81,37 @@ Description: The max-pending-uploads() and upload-threads() options configure th
 * upload-threads() limits the maximum number of parallel uploads.
 * max-pending-uploads() limits the number of chunks that are waiting in the work queue of the upload threads to get uploaded
 
-### object-key()
+## object-key()
 
 |Type:|   template|
 |Default:|           N/A|
 
 *Description:* The unique object key (or key name), which identifies the object in an Amazon S3 bucket.
 
-### object-key-timestamp()
+## object-key-timestamp()
 
 |Type:|   template|
 |Default:|           N/A|
 
 *Description:* The object-key-timestamp() option can be used to set a datetime-related template, which is appended to the end of the object, for example: "`${R_MONTH_ABBREV}${R_DAY}`". When a log message arrives with a newer timestamp template resolution, the previous timestamped object gets finished and a new one is started with the new timestamp. If an older message arrives, it does not reopen the old object, but starts a new object with the key having an index appended to the old object.
 
-#{% include doc/admin-guide/options/persist-name.md %}
+{% include doc/admin-guide/options/persist-name.md %}
 
-### region()
+## region()
 
 |Type:|   string|
 |Default:|           N/A|
 
-
 *Description:* The regional endpoint where the bucket is stored. For example, us-east-1.
 
-### secret-key()
+## secret-key()
 
 |Type:|   string|
 |Default:|           N/A|
 
 *Description:* The `SECRET_KEY` of the service account used to access the S3 bucket. (Together with access-key().)
 
-### storage-class()
+## storage-class()
 
 |Type:|   string|
 |Default:|           STANDARD|
@@ -125,20 +122,20 @@ Description: The max-pending-uploads() and upload-threads() options configure th
 
 If an invalid value is configured, the default is used.
 
-### upload-threads()
+## upload-threads()
 
 |Type:|   integer|
 |Default:|           8|
 
 *Description:* The number of {{ site.product.short_name }} worker threads that are used to upload data to S3 from this destination.
 
-### template()
+## template()
 
 *Description:* The message as written to the Amazon S3 object. You can use templates and template functions to format the message.
 
-### url()
+## url()
 
 |Type:|   string|
 |Default:|           N/A|
 
-*Description:* The URL of the S3 bucket, for example, `https://my-bucket.s3.us-west-2.amazonaws.com`.
+*Description:* The API endpoint URL of the S3 bucket. When used with Amazon AWS, the {{ site.product.short_name }} S3 destination automatically creates the service URL. It is recommended that you omit this option. This option is required only if the {{ site.product.short_name }} S3 driver is used in conjunction with third-party S3 service providers, such as MinIO or Google Cloud.