What probably matters to youSection of the release
What
MCP_TIMEOUT and MCP_CONNECT_TIMEOUT_MS are now capped at 2147483647 milliseconds. Values above that used to overflow the underlying timer and expire immediately; defaults remain 30000 and 5000 milliseconds.
Evidence
MCP_CONNECT_TIMEOUT_MS
Strings lifted out of the shipped bundle, so the claim above can be checked against them.