better align default values with upstream OPNsense HAProxy plugin

[fraenki]

Currently several default values for frontends/backends deviate from the HAProxy plugin in OPNsense. As a result, some very rarely used features are enabled by default (SSL client authentication, basic authentication, enforcing HTTP2 for non-SSL connections, and so on). The resulting configs are not very useful unfortunately. :(

This PR corrects these default values and replaces them with the same values that are used by the OPNsense HAProxy plugin.

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (3de31c5) compared to base (3bc181e).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #22   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines          572       572           
=========================================
  Hits           572       572           

Impacted Files	Coverage Δ
lib/puppet/type/opnsense_haproxy_backend.rb	100.00% <ø> (ø)
lib/puppet/type/opnsense_haproxy_frontend.rb	100.00% <ø> (ø)
lib/puppet/type/opnsense_haproxy_server.rb	100.00% <ø> (ø)

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