Update ruby-module.5 for Ruby 3.4 addition

Update lang/ruby module documentation for the removal of Ruby 3.1

Update ruby-module.5 for default Ruby version switch to 3.3

Update lang/ruby module documentation for Ruby 3.3

Update lang/ruby module documentation for the removal of Ruby 3.0

plaform -> platform

Full rewrite of lang/ruby port module documentation

Restructure so that the most important information is first.
Describe how it modifies bsd.port.mk variables.
Document all public variables set by

Full rewrite of lang/ruby port module documentation

Restructure so that the most important information is first.
Describe how it modifies bsd.port.mk variables.
Document all public variables set by the module.

Rewrite prompted by feedback from schwarze@
Multiple rounds of review and many fixes from schwarze@
OK schwarze@

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minor mandoc -T lint fixes, no content change

Update to reflect changes in ruby.port.mk

This now documents all variables in ruby.port.mk except the internal
ones prefixed with an underscore, and reflects the removal of support
for building JRub

Update to reflect changes in ruby.port.mk

This now documents all variables in ruby.port.mk except the internal
ones prefixed with an underscore, and reflects the removal of support
for building JRuby ports. Documenting the purpose of each variable
will come in a future update.

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Update to reflect that default Ruby version in ports is now 3.2

Fix list of possible values of MODRUBY_REV

With Ruby 2.7 in the attic, MODRUBY_REV can no longer be set to 2.7.
It has been possible to set it to 3.2 for a while.

Update documentation for removal of ruby27 FLAVOR

Document ruby32 FLAVOR for Ruby ports

Update documentation for switch of default ruby version to 3.1

Document ruby31 FLAVOR

Remove Ruby 2.6 mentions

Update for change of default Ruby version to 3.0.

nobody noticed, but the variable is still called "MODULES" with an S

Document ruby30 FLAVOR for Ruby ports

Update ruby-module.5 for change in default Ruby version

Update ruby-module.5 for removal of Ruby 2.5

Document ruby27 FLAVOR

Remove mention of ruby24 FLAVOR

Update to reflect change of default ruby version to ruby 2.6

Document ruby26 FLAVOR