Fix spelling in pod files

The B<engine> command is used to query the status and capabilities

of the specified B<engine>'s.

Engines may be speicifed before and after all other command-line flags.

Engines may be specified before and after all other command-line flags.

Only those specified are queried.

=head1 OPTIONS

descriptors but will still populate B<*numfds>. Therefore application code is

typically expected to call this function twice: once to get the number of fds,

and then again when sufficient memory has been allocated. If only one

asynchronous engine is being used then noramlly this call will only ever return

asynchronous engine is being used then normally this call will only ever return

one fd. If multiple asynchronous engines are being used then more could be

returned.

with them. Applications can wait for the file descriptor to be ready for "read"

using a system function call such as select or poll (being ready for "read"

indicates that the job should be resumed). If no file descriptor is made

available then an application will have to priodically "poll" the job by

available then an application will have to periodically "poll" the job by

attempting to restart it to see if it is ready to continue.

An example of typical usage might be an async capable engine. User code would

=head1 RETURN VALUES

BIO_lookup() returns 1 on success and 0 when an error occurred, and

will leave an error indicaton on the OpenSSL error stack in that case.

will leave an error indication on the OpenSSL error stack in that case.

All other functions described here return 0 or B<NULL> when the

information they should return isn't available.

In versions of OpenSSL prior to 1.1.0 SSL_COMP_free_compression_methods() freed

the internal table of compression methods that were built internally, and

possibly augmented by adding SSL_COMP_add_compression_method(). However this is

now unncessary from version 1.1.0.  No explicit initialisation or

now unnecessary from version 1.1.0.  No explicit initialisation or

de-initialisation is necessary. See L<OPENSSL_init_crypto(3)> and

L<OPENSSL_init_ssl(3)>. From OpenSSL 1.1.0 calling this function does nothing.