connecting to opensearch via ipv6

#### Steps to replicate

Provide example config and message
```
host "[ipv6:add:ress]"
scheme https
ssl_verify false
```
the above snippet is in our `match` config block in fluentd

#### Expected Behavior or What you need to ask
I would expect the plugin to open an ipv6 SSL connection to the opensearch host. Instead we get error like this
```
Could not communicate to OpenSearch, resetting connection and trying again. SSL_connect returned=1 errno=0 peeraddr=[REDACTED]:9200 state=error: sslv3 alert illegal parameter (OpenSSL::SSL::SSLError)
```
#### Using Fluentd and OpenSearch plugin versions

* Debian 12
* Docker
* Fluentd v1.0 or later
* fluentd 1.16.2
```
abbrev (default: 0.1.0)
async (1.31.0)
async-http (0.60.2)
async-io (1.36.0)
async-pool (0.4.0)
aws-eventstream (1.2.0)
aws-partitions (1.825.0)
aws-sdk-core (3.182.0)
aws-sigv4 (1.6.0)
base64 (default: 0.1.1)
benchmark (default: 0.2.0)
bigdecimal (default: 3.1.1, 1.4.4)
bundler (2.4.19)
cgi (default: 0.3.6)
concurrent-ruby (1.2.2)
console (1.23.2)
cool.io (1.8.0)
csv (default: 3.2.5)
date (default: 3.2.2)
delegate (default: 0.2.0)
did_you_mean (default: 1.6.1)
digest (default: 3.1.0)
drb (default: 2.1.0)
english (default: 0.7.1)
erb (default: 2.2.3)
error_highlight (default: 0.3.0)
etc (default: 1.3.0)
excon (0.103.0)
faraday (2.7.11)
faraday-excon (2.1.0)
faraday-net_http (3.0.2)
faraday_middleware-aws-sigv4 (1.0.1)
fcntl (default: 1.0.1)
fiber-annotation (0.2.0)
fiber-local (1.0.0)
fiddle (default: 1.1.0)
fileutils (default: 1.6.0)
find (default: 0.1.1)
fluent-config-regexp-type (1.0.0)
fluent-plugin-opensearch (1.1.4)
fluent-plugin-rewrite-tag-filter (2.4.0)
fluentd (1.16.2)
forwardable (default: 1.3.2)
getoptlong (default: 0.1.1)
http_parser.rb (0.8.0)
io-console (default: 0.5.11)
io-nonblock (default: 0.1.0)
io-wait (default: 0.2.1)
ipaddr (default: 1.2.4)
irb (default: 1.4.1)
jmespath (1.6.2)
json (2.6.3, default: 2.6.1)
logger (default: 1.5.0)
msgpack (1.7.2)
multi_json (1.15.0)
mutex_m (default: 0.1.1)
net-http (default: 0.3.0)
net-protocol (default: 0.1.2)
nio4r (2.5.9)
nkf (default: 0.1.1)
observer (default: 0.1.1)
oj (3.16.1)
open-uri (default: 0.2.0)
open3 (default: 0.1.1)
opensearch-ruby (3.0.1)
openssl (default: 3.0.1)
optparse (default: 0.2.0)
ostruct (default: 0.5.2)
pathname (default: 0.2.0)
pp (default: 0.3.0)
prettyprint (default: 0.1.1)
protocol-hpack (1.4.2)
protocol-http (0.24.7)
protocol-http1 (0.15.1)
protocol-http2 (0.15.1)
pstore (default: 0.1.1)
psych (default: 4.0.4)
racc (default: 1.6.0)
readline (default: 0.0.3)
readline-ext (default: 0.1.4)
reline (default: 0.3.1)
resolv (default: 0.2.1)
resolv-replace (default: 0.1.0)
rexml (3.2.6)
rinda (default: 0.1.1)
ruby2_keywords (default: 0.0.5)
securerandom (default: 0.2.0)
serverengine (2.3.2)
set (default: 1.0.2)
shellwords (default: 0.1.0)
sigdump (0.2.5)
singleton (default: 0.1.1)
stringio (default: 3.0.1)
strptime (0.2.5)
strscan (default: 3.0.1)
syslog (default: 0.1.0)
tempfile (default: 0.1.2)
time (default: 0.2.2)
timeout (default: 0.2.0)
timers (4.3.5)
tmpdir (default: 0.1.2)
traces (0.11.1)
tsort (default: 0.1.0)
tzinfo (2.0.6)
tzinfo-data (1.2023.3)
un (default: 0.2.0)
uri (0.12.2, default: 0.12.1)
weakref (default: 0.1.1)
webrick (1.7.0)
yajl-ruby (1.4.3)
yaml (default: 0.2.0)
zlib (default: 2.1.1)
```

we currently run into an issue when we want the opensearch-fluentd plugin to connect via ipv6 to our opensearch. According to the docs here it should be configured as `host "[ip:v6:add:ress]"` When doing so the fluent logs state that an SSL connection
```
Could not communicate to OpenSearch, resetting connection and trying again. SSL_connect returned=1 errno=0 peeraddr=[REDACTED]:9200 state=error: sslv3 alert illegal parameter (OpenSSL::SSL::SSLError)
Remaining retry: 10. Retry to communicate after 32 second(s).
```
which is weird as at least on ipv4 the SSL to the same host is no problem. Is there any special SSL handling when connecting via IPv6 to a opensearch host?

Furthermore I wonder if it should be possible to use a hostname instead of a IPv6 address? We have a hostname which resolves to 3 AAAA recs of our opensearch hosts (only AAAA recs no A recs), but when using that hostname fluentd throws errors that I cannot resolve/connect as the hostname is invalid.