Remove man pages along with doc (#244)

This has the added benefit of eliminating case-sensitivity from our rootfs images, allowing them to be properly unpacked on macOS.

src/build_img/common.jl

@@ -63,11 +63,15 @@ function cleanup_rootfs(rootfs; rootfs_info=nothing)
         mkdir(apt_lists_dir)
     end
 
-    # Remove `/usr/share/doc`, as that's not particularly useful
+    # Remove `/usr/share/{doc,man}`, as that's not particularly useful
     if isdir(joinpath(rootfs, "usr", "share", "doc"))
         @info("Removing `/usr/share/doc`...")
         rm(joinpath(rootfs, "usr", "share", "doc"); recursive=true, force=true)
     end
+    if isdir(joinpath(rootfs, "usr", "share", "man"))
+        @info("Removing `/usr/share/man`...")
+        rm(joinpath(rootfs, "usr", "share", "man"); recursive=true, force=true)
+    end
 
     # Add `juliaci` user and group
     @info("Adding 'juliaci' user and group as 1000:1000")