fork error against windows server

[dcb530]

I am trying to using the plugin against Redmine 3.3 on Windows server.

After I saved the setting of Clone URL for SSH, I got the Internal Error. Checking the Redmine log, it shows as following:

`Started GET "/redmine/projects/testproject/repositories/new?repository_scm=GitRemote" for 127.0.0.1 at 2017-09-08 09:47:07 +0800
Processing by RepositoriesController#new as JS
Parameters: {"repository_scm"=>"GitRemote", "project_id"=>"testproject"}
Current user: daichengbo (id=8)
Rendered repositories/_form.html.erb (2.0ms)
Rendered repositories/new.html.erb (3.0ms)
Rendered repositories/new.js.erb (4.0ms)
Completed 200 OK in 66ms (Views: 4.1ms | ActiveRecord: 56.0ms)
Started POST "/redmine/projects/testproject/repositories" for 127.0.0.1 at 2017-09-08 09:47:17 +0800
Processing by RepositoriesController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"DypRYb/ojQHHhjesW1/JhkAnNmgMZvPYRHTFLk5zk99YxuZaeUADcqyKU94vUtL+DGRbJLpUUYhEtW/2eaQwmQ==", "repository_scm"=>"GitRemote", "repository"=>{"is_default"=>"0", "identifier"=>"", "url"=>"", "extra_clone_url"=>"git@GitLab.cdyoue.com:root/testproject.git"}, "commit"=>"创建", "project_id"=>"testproject"}
Current user: daichengbo (id=8)
Completed 500 Internal Server Error in 104ms (ActiveRecord: 85.0ms)

NotImplementedError (fork() function is unimplemented on this machine):
plugins/redmine_git_remote/lib/redmine_git_remote/poor_mans_capture3.rb:18:in fork' plugins/redmine_git_remote/lib/redmine_git_remote/poor_mans_capture3.rb:18:in capture3'
plugins/redmine_git_remote/lib/redmine_git_remote/poor_mans_capture3.rb:38:in capture2' plugins/redmine_git_remote/app/models/repository/git_remote.rb:160:in add_known_host'
plugins/redmine_git_remote/app/models/repository/git_remote.rb:94:in ensure_possibly_empty_clone_exists' plugins/redmine_git_remote/app/models/repository/git_remote.rb:84:in initialize_clone'
app/controllers/repositories_controller.rb:55:in create' lib/redmine/sudo_mode.rb:63:in sudo_mode'`

[dcb530]

Here is my redmine info:

Environment:
Redmine version 3.3.3.stable
Ruby version 2.3.3-p222 (2016-11-21) [i386-mingw32]
Rails version 4.2.7.1
Environment production
Database adapter Mysql2
SCM:
Git 2.7.2
Filesystem
GitRemote 2.7.2
Redmine plugins:
clipboard_image_paste 1.12
plantuml 0.3.0
redmine_git_remote 0.0.1
redmine_gitlab_hook 0.1.3
redmine_ldap_sync 2.0.8.devel.g0ad6646785
redmine_wiki_extensions 0.7.0
sidebar_hide 0.0.8
status_button 0.1.0

[dergachev]

It's not supported on Windows, unfortunately because I don't have a VM to test it.

But, some good people actually did a PR I didn't have a chance to test.

See #22 and the PR #23, and also the note at the end:
#23 (comment)

Would love to hear your feedback, if you're capable of testing these changes.