Updated doc for --save-session option.

doc/aria2c.1.asciidoc

@@ -1069,6 +1069,10 @@ connections.
   downloads added by *<<aria2_rpc_aria2_addTorrent, aria2.addTorrent>>* and
   *<<aria2_rpc_aria2_addMetalink, aria2.addMetalink>>*
   RPC method and whose metadata could not be saved as a file are not saved.
+  Downloads removed using
+  *<<aria2_rpc_aria2_remove, aria2.remove>>* and
+  *<<aria2_rpc_aria2_forceRemove, aria2.forceRemove>>*
+  will not be saved.
 
 [[aria2_optref_stop]]*--stop*=SEC::
   Stop application after SEC seconds has passed.

src/usage_text.h

@@ -669,7 +669,9 @@
     "                              option on restart. Please note that downloads\n" \
     "                              added by aria2.addTorrent and aria2.addMetalink\n" \
     "                              RPC method and whose metadata could not be saved\n" \
-    "                              as a file will not be saved.")
+    "                              as a file will not be saved. Downloads removed\n" \
+    "                              using aria2.remove and aria2.forceRemove will not\n" \
+    "                              be saved.")
 #define TEXT_MAX_CONNECTION_PER_SERVER          \
   _(" -x, --max-connection-per-server=NUM The maximum number of connections to one\n" \
     "                              server for each download.")