Spelling cleanup.

No functional changes, just fixing minor spelling issues.

---

Most of these were identified from the command line by running:

  codespell \
    --ignore-words-list fpr,stati,keyserver,keyservers,asign,cas,iff,ifset \
    --skip '*.po,ChangeLog*,help.*.txt,*.jpg,*.eps,*.pdf,*.png,*.gpg,*.asc' \
    doc g13 g10 kbx agent artwork scd tests tools am common dirmngr sm \
    NEWS README README.maint TODO

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

agent/agent.h

@@ -48,7 +48,7 @@
 #define MAX_DIGEST_LEN 64
 
 /* The maximum length of a passphrase (in bytes).  Note: this is
-   further contrained by the Assuan line length (and any other text on
+   further constrained by the Assuan line length (and any other text on
    the same line).  However, the Assuan line length is 1k bytes so
    this shouldn't be a problem in practice.  */
 #define MAX_PASSPHRASE_LEN 255
@@ -126,7 +126,7 @@ struct
   int enable_passphrase_history;
 
   /* If set the extended key format is used for new keys.  Note that
-   * this may vave the value 2 in which case
+   * this may have the value 2 in which case
    * --disable-extended-key-format won't have any effect and thus
    * effectivley locking it.  This is required to support existing
    * profiles which lock the use of --enable-extended-key-format. */

agent/cache.c

@@ -205,7 +205,7 @@ housekeeping (void)
   for (r=thecache; r; r = r->next)
     {
       if (r->cache_mode == CACHE_MODE_PIN)
-        ; /* Don't let it expire - scdaemon explictly flushes them.  */
+        ; /* Don't let it expire - scdaemon explicitly flushes them.  */
       else if (r->pw && r->ttl >= 0 && r->accessed + r->ttl < current)
         {
           if (DBG_CACHE)

agent/command-ssh.c

@@ -1508,7 +1508,7 @@ ssh_signature_encoder_dsa (ssh_key_type_spec_t *spec,
 
   /* DSA specific code.  */
 
-  /* FIXME: Why this complicated code?  Why collecting boths mpis in a
+  /* FIXME: Why this complicated code?  Why collecting both mpis in a
      buffer instead of writing them out one after the other?  */
   for (i = 0; i < 2; i++)
     {

agent/command.c

@@ -656,7 +656,7 @@ static const char hlp_setkeydesc[] =
   "Set a description to be used for the next PKSIGN, PKDECRYPT, IMPORT_KEY\n"
   "or EXPORT_KEY operation if this operation requires a passphrase.  If\n"
   "this command is not used a default text will be used.  Note, that\n"
-  "this description implictly selects the label used for the entry\n"
+  "this description implicitly selects the label used for the entry\n"
   "box; if the string contains the string PIN (which in general will\n"
   "not be translated), \"PIN\" is used, otherwise the translation of\n"
   "\"passphrase\" is used.  The description string should not contain\n"

agent/findkey.c

@@ -199,8 +199,8 @@ write_extended_private_key (char *fname, estream_t fp, int update,
 
 /* Write an S-expression formatted key to our key storage.  With FORCE
  * passed as true an existing key with the given GRIP will get
- * overwritten.  If SERIALNO and KEYREF are give an a Token line is added to
- * th key if the extended format ist used.  */
+ * overwritten.  If SERIALNO and KEYREF are given a Token line is added to
+ * the key if the extended format is used.  */
 int
 agent_write_private_key (const unsigned char *grip,
                          const void *buffer, size_t length, int force,

agent/gpg-agent.c

@@ -2030,7 +2030,7 @@ agent_copy_startup_env (ctrl_t ctrl)
    Fixme: Due to the way the argument parsing works, we create a
    memory leak here for all string type arguments.  There is currently
    no clean way to tell whether the memory for the argument has been
-   allocated or points into the process' original arguments.  Unless
+   allocated or points into the process's original arguments.  Unless
    we have a mechanism to tell this, we need to live on with this. */
 static void
 reread_configuration (void)

agent/pksign.c

@@ -349,7 +349,7 @@ agent_pksign_do (ctrl_t ctrl, const char *cache_nonce,
 
           if (agent_card_serialno (ctrl, &serialno, NULL))
             {
-              /* No card availabale or error reading the card.  */
+              /* No card available or error reading the card.  */
               err = gpg_error (GPG_ERR_NO_SECKEY);
               goto leave;
             }

agent/w32main.c

@@ -40,8 +40,8 @@ static HWND glob_hwnd;
    number of args to reserve before the first one.  This code is based
    on Alexandre Julliard's LGPLed wine-0.9.34/dlls/kernel32/process.c
    and modified to fit into our framework.  The function returns NULL
-   on error; on success an arry with the argiments is returned.  This
-   array has been allocaqted using a plain malloc (and not the usual
+   on error; on success an array with the arguments is returned.  This
+   array has been allocated using a plain malloc (and not the usual
    xtrymalloc). */
 static char **
 build_argv (char *cmdline_arg, int reserved)