Jenkins插件更新门户不起作用：https://updates.jenkins.io/download/plugins/job-dsl/1.77/job-dsl.hpi
[似乎有些mirrors.jenkinsci.org停止工作：
wget https://updates.jenkins.io/download/plugins/job-dsl/1.77/job-dsl.hpi
--2020-06-03 06:17:55-- https://updates.jenkins.io/download/plugins/job-dsl/1.77/job-dsl.hpi
Resolving updates.jenkins.io (updates.jenkins.io)... 52.202.51.185
Connecting to updates.jenkins.io (updates.jenkins.io)|52.202.51.185|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://mirrors.jenkins-ci.org/plugins/job-dsl/1.77/job-dsl.hpi [following]
--2020-06-03 06:17:56-- http://mirrors.jenkins-ci.org/plugins/job-dsl/1.77/job-dsl.hpi
Resolving mirrors.jenkins-ci.org (mirrors.jenkins-ci.org)... 52.202.51.185
Connecting to mirrors.jenkins-ci.org (mirrors.jenkins-ci.org)|52.202.51.185|:80... connected.
HTTP request sent, awaiting response...
和
wget http://mirrors.jenkins-ci.org
--2020-06-03 06:21:37-- http://mirrors.jenkins-ci.org/
Resolving mirrors.jenkins-ci.org (mirrors.jenkins-ci.org)... 52.202.51.185
Connecting to mirrors.jenkins-ci.org (mirrors.jenkins-ci.org)|52.202.51.185|:80... connected.
HTTP request sent, awaiting response...