add abi compatibility detective.
update proxy_bind to support variable
update proxy_bind to support variable
The "fastcgi_bind", "uwsgi_bind", "scgi_bind" and "memcached_bind" directives are now inherited; inherited value can be reset by the "off" parameter.  Duplicate directives are now detected.  Parameter value can now contain variables.
Merge pull request #257 from jinglong/bind

update proxy_bind to support variable
bumped version to 1.5.0
Merge pull request #259 from zhuzhaoyuan/bump-version-1.5.0

bumped version to 1.5.0
added TENGINE macro as "Tengine"
adde a member 'server_tag_header' in ngx_http_core_loc_conf_t to replace 'server_tag'
now the 'server_tokens' and 'server_tag' directives can change the server banner in a default error page.
added test cases
reverted version to 1.5.0
Merge pull request #264 from zhuzhaoyuan/suppress-server-banner

Suppress server banner in error pages
fixed coding style
fixed coding style
Merge pull request #265 from zhuzhaoyuan/fix-coding-style-1.5.0

fixed coding style
Merge pull request #256 from monadbobo/dso_fix0604

added abi compatibility detective for DSO.
fixed the mismatch footer module configure option

renamed '--without-http_footer_module' to '--without-http_footer_filter_module'
Merge pull request #269 from yaoweibin/footer_filter

fixed the mismatch footer module configure option
add ngx_http_trim_filter_module