main: Use latest Go 1.26 features if possible. - #3776
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The existing code in the main module will all work properly with all changes in Go 1.26, so this updates the default GODEBUG directive to ensure the new features and security updates implemented in Go 1.26 are enabled when building with Go 1.26 or newer. The specific GODEBUG flags removed are: * `cryptocustomrand=1` * `tlssecpmlkem=0` * `urlstrictcolons=0` None of these will affect existing deployments.
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This is rebased on #3775.
The existing code in the main module will all work properly with all changes in Go 1.26, so this updates the default
GODEBUGdirective to ensure the new features and security updates implemented in Go 1.26 are enabled when building with Go 1.26 or newer.The specific
GODEBUGflags removed are:cryptocustomrand=1tlssecpmlkem=0urlstrictcolons=0None of these will affect existing deployments.