Add better support for Windows (#291)

bin/_blackbox_common.sh

@@ -213,7 +213,8 @@ function add_filename_to_cryptlist() {
   else
     echo "========== Adding file to list."
     touch "$BB_FILES"
-    sort -u -o "$BB_FILES" <(echo "$name") "$BB_FILES"
+    echo "$name" >> "$BB_FILES"
+    sort -u -o "$BB_FILES" "$BB_FILES"
   fi
 }
 

bin/blackbox_addadmin

@@ -19,7 +19,8 @@ KEYNAME="$1"
 # Add the email address to the BB_ADMINS file.  Remove any duplicates.
 # The file must exist for sort to act as we expect.
 touch "$BB_ADMINS"
-sort  -fdu -o "$BB_ADMINS" <(echo "$1") "$BB_ADMINS"
+echo "$1" >> "$BB_ADMINS"
+sort -fdu -o "$BB_ADMINS" "$BB_ADMINS"
 
 
 # Add the user's key to the keychain.