eget: add --get-ipfs-cid to help, fix for case when IPFS is disabled (no accessible gateway)

bin/tools_eget

@@ -357,6 +357,7 @@ Options:
     --get-response URL        - get response with all headers (ever if HEAD is not acceptable)
     --get-filename URL        - print filename for the URL (via Content-Disposition if applicable)
     --get-real-url URL        - print URL after all redirects
+    --get-ipfs-cid URL        - print CID for URL (after all redirects)
 
 Supported URLs:
   ftp:// http:// https:// file:/ ipfs://
@@ -606,12 +607,12 @@ ipfs_mode="$EGET_IPFS"
 [ -z "$ipfs_mode" ] && [ -n "$EGET_IPFS_DB" ] && ipfs_mode="auto"
 
 if [ -n "$LISTONLY$CHECKURL" ] ; then
-    ipfs_mode="disabled"
+    ipfs_mode=""
     EGET_IPFS_DB=''
 fi
 
 
-if [ "$ipfs_mode" != "disabled" ] && [ -n "$EGET_IPFS_DB" ] ; then
+if [ -n "$ipfs_mode" ] && [ -n "$EGET_IPFS_DB" ] ; then
     ddb="$(dirname "$EGET_IPFS_DB")"
     if [ -d "$ddb" ] ; then
         info "Using eget IPFS db $EGET_IPFS_DB"
@@ -628,7 +629,7 @@ if is_ipfsurl "$1" && [ -z "$ipfs_mode" ] || [ "$ipfs_mode" = "auto" ] ; then
     select_ipfs_mode
     info "Auto selected IPFS mode: $ipfs_mode"
 else
-    [ -n "$ipfs_mode" ] && [ "$ipfs_mode" != "disabled" ] && info "IPFS mode: $ipfs_mode"
+    [ -n "$ipfs_mode" ] && info "IPFS mode: $ipfs_mode"
 fi
 
 IPFS_CMD=''
@@ -1052,7 +1053,7 @@ url_get_filename()
 fi
 
 
-if [ "$ipfs_mode" != "disabled" ] && [ -n "$EGET_IPFS_DB" ] &&  ! is_ipfsurl "$1"  ; then
+if [ -n "$ipfs_mode" ] && [ -n "$EGET_IPFS_DB" ] &&  ! is_ipfsurl "$1"  ; then
 
 download_to_ipfs()
 {