Update library/Zend/Mail/Transport/Sendmail.php

change key for additional_parameters argument

fix: 
sendmail error
sendmail: illegal option -- r
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
pass on the configured format to the DateValidator instead of hardcoding it
removed whitespaces in blank line
remove trailing spaces (again)
added newline (PSR-2)
after a discussion with Matthew, I'm removing this method alltogether because the parent already does this
Merge branch 'master' of git://github.com/craz/zf2-1 into hotfix/3261
[#3261] use -f switch instead of -r

- "-r" is evidently a deprecated/obsolete synonym for "-f", and not
  present on current versions of sendmail (though still present on many
  clones, including postfix, exim, and qmail)
  - updated tests to refer to "-f" instead of "-r"
Merge branch 'hotfix/3261'

Close #3261
Merge branch 'date-validator-format' of git://github.com/skoop/zf2 into hotfix/3328
[#3328][#3269] Ensure date format is used consistently

- Removed getDateValidator() from all date/time element implementations
- Ensured $format is present on all date/time element implementations
- Use $format when creating step validators
Merge branch 'hotfix/3328'

Close #3328
Close #3269
Fix #3195