nginx: share more parts, drop obsolete sections

component/nginx/buildout.cfg

 [buildout]
 extends =
   ../coreutils/buildout.cfg
-  ../git/buildout.cfg
   ../libexpat/buildout.cfg
   ../openssl/buildout.cfg
-  ../patch/buildout.cfg
   ../pcre/buildout.cfg
   ../zlib/buildout.cfg
 
@@ -12,13 +10,12 @@ parts = nginx-output
 
 [nginx-common]
 recipe = slapos.recipe.cmmi
-shared = false
+shared = true
 url = https://nginx.org/download/nginx-1.19.2.tar.gz
 md5sum = 3dc55f6451ed6f819f1c796f4e5e9617
 
 [nginx]
 <= nginx-common
-shared = true
 configure-options=
   --with-http_ssl_module
   --with-http_v2_module
@@ -32,10 +29,10 @@ configure-options=
 
 [nginx-dav-ext-module]
 recipe = slapos.recipe.build:download-unpacked
+shared = true
 url = https://github.com/arut/nginx-dav-ext-module/archive/v0.0.3.tar.gz
 strip-top-level-dir = true
 md5sum = 2cb502dbda335be4ebd5fed0b3182bae
-mode = 0644
 
 [nginx-webdav]
 <= nginx-common
@@ -61,29 +58,11 @@ command = ${coreutils-output:test} -x ${:nginx} -a -f ${:mime}
 nginx = ${nginx:location}/sbin/nginx
 mime = ${nginx:location}/conf/mime.types
 
-[hexaglobe-nginx-module]
-recipe = hexagonit.recipe.download
-ignore-existing = true
-url = http://easicloud-p.cdn.hexaglobe.net/nginx-easicloud.tar.gz
-md5sum = 57fe2ceb09740f22b5b1023f29889e0e
-strip-top-level-dir = true
-
-[nginx-enable-sub]
-# Used by Hexaglobe for watermarking
-<= nginx
-configure-options=
-  --with-ipv6
-  --with-http_ssl_module
-  --with-ld-opt="-L ${zlib:location}/lib -L ${openssl:location}/lib -L ${pcre:location}/lib  -Wl,-rpath=${pcre:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${openssl:location}/lib"
-  --with-cc-opt="-I ${pcre:location}/include -I ${openssl:location}/include -I ${zlib:location}/include"
-  --add-module=${hexaglobe-nginx-module:location}/sub_module
-# --add-module=${hexaglobe-nginx-module:location}/nginx-upstream-fair
-
 [nginx-push-stream-module]
-recipe = slapos.recipe.build:gitclone
-repository = https://github.com/wandenberg/nginx-push-stream-module.git
-revision = 3d3a204177d3a7ab8a2858e04e792a6d11bf133f
-git-executable = ${git:location}/bin/git
+recipe = slapos.recipe.build:download-unpacked
+shared = true
+url = https://github.com/wandenberg/nginx-push-stream-module/archive/0.4.0.tar.gz
+md5sum = d9cba621b8739e13bdb5e02b9425f205
 
 [nginx-push-stream]
 <= nginx-common