Doc: trustProxyData() is now replaced by setTrustedProxies().
merged branch FGM/doc-trustProxyData-obsolete (PR #690)

This PR was merged into the master branch.

Discussion
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Doc: trustProxyData() is now replaced by setTrustedProxies().

Although trustProxyData() is deprecated, the documentation still refers to it, causing deprecation warnings. This patch suggested an updated wording.

Commits
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d45ba3e Doc: trustProxyData() is now replaced by setTrustedProxies().