whatsnew for pep 466 ssl backport

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branch : 3.4
extra : source : 5fba28d3d071e9d71762b2ba7f8123fb2a7bd01a
remove extra letter

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branch : 3.4
extra : source : a33afa468c34091f81540664739862cb80fce6a0
standardize pep 466 relnote style

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branch : 3.4
extra : source : 2ce7e7bc3e0c7d88d02aeacd8a972bf8031edb10