ioc: install busybox symbolic links.

Make all busybox goodies directly available in PATH, to avoid having to
call them from the multicall binary.

This allows the removal of the wget package from the build image, since
busybox provides its own version, and it's become simpler to use that.
However, the version packaged by Debian does not implement the `-o`
flag, requiring us to use shell redirection instead.

Fixes: 8f02abc

Dockerfile

@@ -16,10 +16,9 @@ RUN apt update -y && \
         busybox \
         netcat-openbsd \
         procserv \
-        wget \
         $([ -n "$RUNTIME_PIP_PACKAGES" ] && echo pip) \
         $RUNTIME_PACKAGES && \
-    ln -s /bin/busybox /usr/bin/unzip && \
+    busybox --install && \
     apt clean && \
     rm -rf /var/lib/apt/lists/*
 

base/lnls-get-n-unpack.sh

@@ -18,7 +18,7 @@ for url; do
     download_dir=$(mktemp -d)
 
     echo Downloading "$url"...
-    wget -P $download_dir -o /tmp/wget.log "$url" || (cat /tmp/wget.log && false)
+    wget -P $download_dir "$url" &> /tmp/wget.log || (cat /tmp/wget.log && false)
 
     filename=$(basename $download_dir/*)