doc: add --label option to man page

Document the new option and clarify its description in the --help output a bit
as well.

Signed-off-by: Jonas Witschel <diabonas@gmx.de>

Author: diabonas

man/tpm2-totp.1.md

@@ -24,7 +24,7 @@ options.
 
   * `generate`:
     Generate a new TOTP secret.
-    Possible options: `-b`, `-N`, `-p`, `-P`, `-T`
+    Possible options: `-b`, `-l`, `-N`, `-p`, `-P`, `-T`
 
   * `calculate`:
     Calculate a TOTP value.
@@ -50,6 +50,9 @@ options.
   * `-h`, `--help`:
     Print help
 
+  * `-l`, `--label`:
+    Label to use for display in the TOTP authenticator app (default: TPM2-TOTP)
+
   * `-N <nvindex>`, `--nvindex <nvindex>`:
     TPM NV index to store data (default: 0x018094AF)
 

src/tpm2-totp.c

@@ -36,12 +36,12 @@ char *help =
     "Options:\n"
     "    -h, --help      print help\n"
     "    -b, --banks     Selected PCR banks (default: SHA1,SHA256)\n"
+    "    -l, --label     Label to use for display in the TOTP authenticator app (default: TPM2-TOTP)\n"
     "    -N, --nvindex   TPM NV index to store data (default: 0x018094AF)\n"
     "    -P, --password  Password for recovery/resealing (default: None)\n"
     "    -p, --pcrs      Selected PCR registers (default: 0,2,4,6)\n"
     "    -t, --time      Show the time used for calculation\n"
     "    -T, --tcti      TCTI to use\n"
-    "    -l, --label     Hostname to use for the TOTP label\n"
     "    -v, --verbose   print verbose messages\n"
     "\n";