Request for Approval: 8068795: Missing trailing blank in a HttpServer response leads to client crashes

[Lev Priima]

Please approve and push backport:
> jdk8u-dev changeset: 
> http://cr.openjdk.java.net/~lpriima/8068795/8u/webrev.00/
Original patch http://hg.openjdk.java.net/jdk9/dev/jdk/rev/4fa8d83cfa5e 
can be smoothly applied to repo 
http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk by command:

jdk8u-dev/jdk$ (cd ~/code/jdk9/dev/jdk && hg pull -u && hg diff --git -r 
32e5cb13a06b -r 4fa8d83cfa5e) | bash 
~/code/jdk9/dev/common/bin/unshuffle_patch.sh jdk - - | hg patch - 
--no-commit
> bug: https://bugs.openjdk.java.net/browse/JDK-8068795
>    jdk9 review: 
> http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-January/030843.html
>    Testing against 8u-dev tip:
> $ jtreg -nr -jdk:8u jdk8u-dev/jdk/test/sun/net/
> Test results: passed: 103
> $ jtreg -nr -jdk:8u jdk8u-dev/jdk/test/com/sun/net/
> Test results: passed: 43
>