update variables document
Merge remote-tracking branch 'alibaba/master'
Merge pull request #39 from yzprofile/master

update variables document
Add memfree document for sysguard.
Add sysguard document.
Merge pull request #40 from jinglong/master

add document for star
released tengine-1.4.4
fixed typo
added docs of http_upstream_session_sticky_cn.html
Merge pull request #42 from yaoweibin/tengine-1.4.4

Tengine 1.4.4
fix menu
Merge pull request #43 from yzprofile/master

fix menu
Update core_cn.html
Update core.html
Merge pull request #44 from cfsego/master

update document of core.html
fixed the page header for session sticky module
translate all the MS-DOS format docs to UNIX format

All the changes are replacing '\r\n' to be '\n'.
Document of http sysguard module
Merge pull request #41 from lifeibo/topic

Add sysguard documents.
Merge remote-tracking branch 'origin/master' into update_20130326

Conflicts:
	document/http_sysguard.html
	document_cn/http_sysguard_cn.html