RFR: 8163921: HttpURLConnection default Accept header is malformed according to HTTP/1.1 RFC [v3]

[Daniel Jeliński]

> Fix RFC compliance.
> Tier1 and tier2 passed.

Daniel Jeliński has updated the pull request incrementally with one additional commit since the last revision:

  Update accept header to */*

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7181/files
  - new: https://git.openjdk.java.net/jdk/pull/7181/files/86d6d6d1..b9683b31

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7181&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7181&range=01-02

  Stats: 8 lines in 2 files changed: 0 ins; 1 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7181.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7181/head:pull/7181

PR: https://git.openjdk.java.net/jdk/pull/7181