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>

doc/Notes

@@ -130,7 +130,7 @@ the colon format if you want to manually debug things.
 > * How to import a CRL
 
 CRLs are managed by the dirmngr which is a separate package.  The idea
-is to eventaully turn it into a system daemon, so that on a multi-user
+is to eventually turn it into a system daemon, so that on a multi-user
 machine CRLs are handled more efficiently.  As of now the dirmngr
 needs service from gpgsm thus it is best to call it through gpgsm:
 

doc/dirmngr.texi

@@ -1085,7 +1085,7 @@ as a binary blob.
 @c
 @c If no certificate was found, the function returns with the error
 @c GPG_ERR_MISSING_CERT.  Now the signature is verified.  If this fails,
-@c the erro is returned.  On success the @code{validate_cert_chain} is
+@c the error is returned.  On success the @code{validate_cert_chain} is
 @c used to verify that the certificate is actually valid.
 @c
 @c Here we may encounter a recursive situation:

doc/examples/pwpattern.list

@@ -10,7 +10,7 @@
  
 # Reject the usual metavariables.  Usual not required because
 # gpg-agent can be used to reject all passphrases shorter than 8
-# charactes.
+# characters.
 foo
 bar
 baz

doc/gpg-card.texi

@@ -56,7 +56,7 @@ same commands as available in the interactive mode are run from the
 command line.  These commands need to be delimited with a double-dash.
 If a double-dash or a shell specific character is required as part of
 a command the entire command needs to be put in quotes.  If one of
-those commands returns an error the remaining commands are mot anymore
+those commands returns an error the remaining commands are not anymore
 run unless the command was prefixed with a single dash.
 
 A list of commands is available by using the command @code{help} and a

doc/gpg.texi

@@ -3554,7 +3554,7 @@ on the configuration file.
 @c @opindex use-only-openpgp-card
 @c Only access OpenPGP card's and no other cards.  This is a hidden
 @c option which could be used in case an old use case required the
-@c OpenPGP card while several cards are avaiable.  This option might be
+@c OpenPGP card while several cards are available.  This option might be
 @c removed if it turns out that nobody requires it.
 
 @end table
@@ -3945,7 +3945,7 @@ The program returns 0 if there are no severe errors, 1 if at least a
 signature was bad, and other error codes for fatal errors.
 
 Note that signature verification requires exact knowledge of what has
-been signed and by whom it has beensigned.  Using only the return code
+been signed and by whom it has been signed.  Using only the return code
 is thus not an appropriate way to verify a signature by a script.
 Either make proper use or the status codes or use the @command{gpgv}
 tool which has been designed to make signature verification easy for

doc/tools.texi

@@ -83,7 +83,7 @@ or if no such user directory hierarchy exists @file{~/.gnupg/S.log}).
 
 @item --force
 @opindex force
-Delete an already existing socket file.  This option is implictly used
+Delete an already existing socket file.  This option is implicitly used
 if no socket name has been given on the command line.
 
 @item --homedir @var{DIR}

doc/whats-new-in-2.1.txt

@@ -757,7 +757,7 @@ https://gnupg.org/faq/whats-new-in-2.1.html
 ──────────────────────────
 
   Since version 2.1.14 the export and import options have been enhanced
-  to allow the use of /gpg/ to modify a key without first stroing it in
+  to allow the use of /gpg/ to modify a key without first storing it in
   the keyring.  For example:
 
   ┌────