Merge of "in-portal/releases/5.2.1@16068" to "in-portal/branches/5.3.x@16094".
Fixes INP-1298 - Use "http_build_query" to escape url parameters
Bug #0001023: Ability to Keep Language Packs in Sync
Releasing version 'branches/5.3.x' (copy from 'branches/5.2.x') of 'in-portal' module.
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