Adds support for ArchLinux as host OS

* fix rsyslog handling
* don't hardcode dokku path
* add documentation for ArchLinux package build
* add vagrant machine to run the ArchLinux specific steps
* add step in release process for ArchLinux
* enhance docs for easy ArchLinux steps

plugins/nginx-vhosts/dependencies

@@ -25,4 +25,8 @@ case "$DOKKU_DISTRO" in
   opensuse)
     zypper -q in -y nginx bind-utils
     ;;
+
+  arch)
+    pacman -S --noconfirm --noprogressbar --needed nginx bind-tools
+    ;;
 esac

plugins/nginx-vhosts/functions

@@ -32,6 +32,10 @@ restart_nginx() {
     opensuse)
       sudo /sbin/service nginx reload > /dev/null
       ;;
+
+    arch)
+      sudo /usr/bin/systemctl reload nginx
+	  ;;
   esac
 }
 

plugins/nginx-vhosts/install

@@ -13,6 +13,10 @@ case "$DOKKU_DISTRO" in
   opensuse)
     echo "%dokku ALL=(ALL) NOPASSWD:/sbin/service nginx reload, /usr/sbin/nginx -t" > /etc/sudoers.d/dokku-nginx
     ;;
+
+  arch)
+    echo "%dokku ALL=(ALL) NOPASSWD:/usr/bin/systemctl reload nginx, /usr/sbin/nginx -t" > /etc/sudoers.d/dokku-nginx
+    ;;
 esac
 
 chmod 0440 /etc/sudoers.d/dokku-nginx
@@ -57,4 +61,8 @@ case "$DOKKU_DISTRO" in
   opensuse)
     /sbin/service nginx start
     ;;
+
+  arch)
+    /usr/bin/systemctl start nginx
+    ;;
 esac

plugins/nginx-vhosts/post-delete

@@ -14,4 +14,8 @@ case "$DOKKU_DISTRO" in
   opensuse)
     sudo /sbin/service nginx reload > /dev/null
     ;;
+
+  arch)
+    sudo /usr/bin/systemctl reload nginx
+    ;;
 esac