3687 fopen() O_CLOEXEC support via the "e" flag
Reviewed by Robert Mustacchi <rm@joyent.com>
Reviewed by Richard Lowe <richlowe@richlowe.net>
Approved by Dan McDonald <danmcd@nexenta.com>
	[illumos-gate merge]

commit b89a2c3e86acf555d0e45c283052876d244d9e6b
    3687 fopen() O_CLOEXEC support via the "e" flag