gpg: Make --list-options show-usage the default.

* g10/gpg.c (main): Add LIST_SHOW_USAGE.
--

The usage flags are often useful and they don't take away much space
in a key listing.  Thus it is better to have them enabled by default.

Signed-off-by: Werner Koch <wk@gnupg.org>

doc/gpg.texi

@@ -407,9 +407,7 @@ output can directly be added to ssh's @file{authorized_key} file.
 By specifying the key to export using a key ID or a fingerprint
 suffixed with an exclamation mark (!), a specific subkey or the
 primary key can be exported.  This does not even require that the key
-has the authentication capability flag set.  To view the capability
-flags of a key use @code{--list-options show-usage} along with a key
-listing command.
+has the authentication capability flag set.
 
 @item --import
 @itemx --fast-import
@@ -1098,7 +1096,7 @@ give the opposite meaning.  The options are:
   Show usage information for keys and subkeys in the standard key
   listing.  This is a list of letters indicating the allowed usage for a
   key (@code{E}=encryption, @code{S}=signing, @code{C}=certification,
-  @code{A}=authentication).  Defaults to no.
+  @code{A}=authentication).  Defaults to yes.
 
   @item show-policy-urls
   @opindex list-options:show-policy-urls

g10/gpg.c

@@ -2226,7 +2226,8 @@ main (int argc, char **argv)
                           | VERIFY_SHOW_POLICY_URLS
                           | VERIFY_SHOW_STD_NOTATIONS
                           | VERIFY_SHOW_KEYSERVER_URLS);
-    opt.list_options   = LIST_SHOW_UID_VALIDITY;
+    opt.list_options   = (LIST_SHOW_UID_VALIDITY
+                          | LIST_SHOW_USAGE);
 #ifdef NO_TRUST_MODELS
     opt.trust_model = TM_ALWAYS;
 #else