Make the use of JSON library in the SockJS service configurable [SPR-10800]

[spring-projects-issues]

Rossen Stoyanchev opened SPR-10800 and commented

The SockJS message frame is essentially an array of JSON-encoded messages (e.g. a["message1","message2"]). For those JSON-related needs, it should be possible to use any JSON library.

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Affects: 4.0 M1