LibJF

Commits in Release 3.15.9:

• chore(config-core): lift up logic for serializeOneTo
• chore(config-core): lift up logic for loadFromJson and writeTo
• fix(config-core): write comments and name in writeTo, not serializeOneTo
• fix(translate): do not pretend there is a page source if the connection fails
• fix(translate): correct url in testmod
• fix(translate): strange workaround
• chore(translate): more text for workaround
• chore(translate): comment out workaround again since google might have just been flaky
• style: make variant names common