Revert "Nginx: Improve server identity to avoid confusion and still make Drupal (Apache-centric) core happy."

This reverts commit 7a847db99f8037e8f3e3c1381aa68995d7e578b6.
Revert "Properly silence useless checks for .htaccess on BOA also for Site Health Check test in Aegir."

This reverts commit 211a94da9520fa72144a6d255be807249b10bf2a.
Revert "Properly silence useless checks for .htaccess on BOA since it is never used in Nginx."

This reverts commit f5651127ed191df4221e73aab9b7eb97df5b046c.
Revert "Silence useless checks for .htaccess on BOA since it is never used in Nginx."

This reverts commit b246d17e11b7c6aade3e26bb2a57749fd6bf37a1.
Revert "Skip file_create_htaccess() on BOA since .htaccess is never used in Nginx."

This reverts commit fbe71a59a5a447228d015a3bf0b492bbd75cc97d.
Issue #1559116 by mva.name, omega8cc - Make core aware of Nginx and PHP-FPM to avoid confusing alerts.

Conflicts:
	includes/common.inc