[Bug-wget] Fixing progress bar assertions in multibyte locales

[Darshit Shah]

Hi everyone,

As mentioned earlier, there was a bug in the progress bar implementation that 
caused the tests in multi-byte and multi-column locales to fail. I've rectified 
the issue by re-working each part of the progress bar to ensure that they are 
indeed using exactly the amount of space that has been allocated.

I also tried to clean up some of the code. I tested these commits on Travis and 
there seem to be no issues. All tests are passing with Russian, Turkish and C 
locales.

Please review the patch, and if good, I'll push it to master. Since it touches 
the most user-centric part of Wget, I'd like to see it as well reviewed and 
tested as possible.

--
Thanking You,
Darshit Shah

0001-Fix-progress-bar-assertion-with-multibyte-locales.patch
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0002-Re-enable-test-on-multibyte-locale-in-Travis.patch
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