Description:
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i recognized a change to fgets function, which i think is a bug. 
When i try to fetch data from a file handle via fgets, which has been opened via fopen for a local file or url, the lenght parameter now has to be supplied as length+1 to get the desired result.
E.g. fgets($fp, 1) returns false now, fgets($fp, 2) returns the first letter, fgets($fp, 3) returns the first two letters ...
This bug is present in 4.4.4 and 5.1.x, couldn't test 5.2 yet.

Reproduce code:
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<?php

$fp = fopen('http://www.php.net', 'r')
  or die ('could not connect');

var_dump(fgets($fp, 1)); // returns false

var_dump(fgets($fp, 2)); // returns first letter

fclose($fp);


?>

Expected result:
----------------
- first var_dump should return first letter
- second var_dump should return next two letter

Actual result:
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- first var_dump returns false
- second var_dump returns first letter