Add documentation for the -no_alt_chains option for various apps, as well as...

Add documentation for the -no_alt_chains option for various apps, as well as the X509_V_FLAG_NO_ALT_CHAINS flag.

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>

Conflicts:
	doc/apps/cms.pod
	doc/apps/ocsp.pod
	doc/apps/s_client.pod
	doc/apps/s_server.pod
	doc/apps/smime.pod
	doc/apps/verify.pod