caddy: compile golang 1.9 and install Caddy

WIP

software/caddy/instance.cfg.in

+#############################
+#
+# Deploy hello-world instance
+#
+#############################
+[buildout]
+parts =
+  directory
+#  publish-connection-parameter
+
+# Define egg directories to be the one from Software Release
+# (/opt/slapgrid/...)
+# Always the same.
+eggs-directory = {{ buildout['eggs-directory'] }}
+develop-eggs-directory = {{ buildout['develop-eggs-directory'] }}
+offline = true
+
+
+[instance-parameter]
+# Fetch arbitrary parameters defined by the user in SlapOS Master for his instance.
+# We use the slapconfiguration recipe with a few parameters (partition id,
+# computer id, certificate, etc).
+# It will then authenticate to SlapOS Master and fetch the instance parameters.
+# The parameters are accessible from ${instance-parameter:configuration.name-of-parameter}
+# Always the same. Just copy/paste.
+# See docstring of slapos.cookbook:slapconfiguration for more information.
+recipe = slapos.cookbook:slapconfiguration
+computer = ${slap_connection:computer_id}
+partition = ${slap_connection:partition_id}
+url = ${slap_connection:server_url}
+key = ${slap_connection:key_file}
+cert = ${slap_connection:cert_file}
+
+# Create all needed directories, depending on your needs
+[directory]
+recipe = slapos.cookbook:mkdirectory
+home = ${buildout:directory}
+etc = ${:home}/etc
+var = ${:home}/var
+# Executables put here will be started but not monitored (for startup scripts)
+script = ${:etc}/run/
+# Executables put here will be started and monitored (for daemons)
+service = ${:etc}/service
+# Executables put here will be launched after buildout has completed to see
+# if instance is running
+promise = ${:etc}/promise/
+# Path of the log directory used by our service (see [helloweb])
+log = ${:var}/log
\ No newline at end of file

software/caddy/software.cfg

+[buildout]
+extends =
+  ../../component/golang/buildout.cfg
+  ../../component/openssl/buildout.cfg
+  ../../component/zlib/buildout.cfg
+  ../../stack/slapos.cfg
+
+parts = 
+  golang19
+  slapos-cookbook
+  instance-profile
+  caddy-repository
+  caddy
+
+[instance-profile]
+recipe = slapos.recipe.template:jinja2
+template = ${:_profile_base_location_}/instance.cfg.in
+rendered = ${buildout:directory}/instance.cfg
+# MD5 checksum can be skipped for development (easier to develop), but must be filled for production
+md5sum = 227ed080787c1b2d933c7c9f563017cb
+mode = 0644
+extensions = jinja2.ext.do
+context =
+  section buildout  buildout
+
+[gopath]
+directory = ${buildout:directory}/go.work
+src	= ${:directory}/src
+bin	= ${:directory}/bin
+
+[git-repository]
+recipe  = slapos.recipe.build:gitclone
+git-executable = ${git:location}/bin/git
+
+[go-git-repository]
+<= git-repository
+repository = https://${:go.importpath}.git
+location = ${gopath:src}/${:go.importpath}
+
+[caddy-repository]
+<= go-git-repository
+go.importpath = github.com/mholt/caddy
+revision = c4dfbb9956095c92d0586a52723748c070c7b459
+
+[caddy]
+recipe  = slapos.recipe.cmmi
+path    = ${caddy-repository:location}
+go      = ${golang19:location}/bin/go
+configure-command = :
+make-binary = cd ${:path} && ${:go} install
+make-targets =
+environment =
+  PKG_CONFIG_PATH=${openssl:location}/lib/pkgconfig:${zlib:location}/lib/pkgconfig
+  PATH=${pkgconfig:location}/bin:${golang19:location}/bin:${buildout:bin-directory}:%(PATH)s
+  GOPATH=${gopath:directory}