Docs clarification

[users/jgh/exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 0ed867fe74ceaf29b97fdb70508eed44c21b9a90..ed67f8109f9979f86426275f2cf38ca9bd21a62b 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -45,7 +45,7 @@
 . Update the Copyright year (only) when changing content.
 . /////////////////////////////////////////////////////////////////////////////
 
-.set previousversion "4.83"
+.set previousversion "4.84"
 .include ./local_params
 
 .set ACL "access control lists (ACLs)"
@@ -5567,7 +5567,7 @@ of an incoming SMTP connection.
 If you have hosts for which you trust RFC1413 and need this
 information, you can change this.
 
-This line enables an efficiency SMTP option.  It is negociated by clients
+This line enables an efficiency SMTP option.  It is negotiated by clients
 and not expected to cause problems but can be disabled if needed.
 .code
 prdr_enable = true
@@ -9509,7 +9509,7 @@ locks out the use of this expansion item in filter files.
 .cindex "expansion" "inserting from a socket"
 .cindex "socket, use of in expansion"
 .cindex "&%readsocket%& expansion item"
-This item inserts data from a Unix domain or Internet socket into the expanded
+This item inserts data from a Unix domain or TCP socket into the expanded
 string. The minimal way of using it uses just two arguments, as in these
 examples:
 .code
@@ -16502,12 +16502,17 @@ directory containing certificate files.
 For earlier versions of GnuTLS
 the option must be set to the name of a single file.
 
+With OpenSSL the certificates specified
+explicitly
+either by file or directory
+are added to those given by the system default location.
+
 These certificates should be for the certificate authorities trusted, rather
 than the public cert of individual clients.  With both OpenSSL and GnuTLS, if
 the value is a file then the certificates are sent by Exim as a server to
 connecting clients, defining the list of accepted certificate authorities.
 Thus the values defined should be considered public data.  To avoid this,
-use OpenSSL with a directory.
+use the explicit directory version.
 
 See &<<SECTtlssni>>& for discussion of when this option might be re-expanded.
 
@@ -23428,7 +23433,7 @@ unknown state), opens a new one to the same host, and then tries the delivery
 in clear.
 
 
-.option tls_try_verify_hosts smtp "host list&!! unset
+.option tls_try_verify_hosts smtp "host list&!!" unset
 .cindex "TLS" "server certificate verification"
 .cindex "certificate" "verification of server"
 This option gives a list of hosts for which, on encrypted connections,
@@ -23436,7 +23441,7 @@ certificate verification will be tried but need not succeed.
 The &%tls_verify_certificates%& option must also be set.
 Note that unless the host is in this list
 TLS connections will be denied to hosts using self-signed certificates
-when &%tls_verify_certificates%& is set.
+when &%tls_verify_certificates%& is matched.
 The &$tls_out_certificate_verified$& variable is set when
 certificate verification succeeds.
 
@@ -23455,6 +23460,12 @@ you can set
 files.
 For earlier versions of GnuTLS the option must be set to the name of a
 single file.
+
+With OpenSSL the certificates specified
+explicitly
+either by file or directory
+are added to those given by the system default location.
+
 The values of &$host$& and
 &$host_address$& are set to the name and address of the server during the
 expansion of this option. See chapter &<<CHAPTLS>>& for details of TLS.
@@ -23464,7 +23475,7 @@ if neither tls_verify_hosts nor tls_try_verify_hosts are set
 and certificate verification fails the TLS connection is closed.
 
 
-.option tls_verify_hosts smtp "host list&!! unset
+.option tls_verify_hosts smtp "host list&!!" unset
 .cindex "TLS" "server certificate verification"
 .cindex "certificate" "verification of server"
 This option gives a list of hosts for which. on encrypted connections,
@@ -26562,7 +26573,7 @@ during TLS session handshake, to permit alternative values to be chosen:
 &%tls_verify_certificates%&
 .next
 .vindex "&%tls_ocsp_file%&"
-&%tls_verify_certificates%&
+&%tls_ocsp_file%&
 .endlist
 
 Great care should be taken to deal with matters of case, various injection
@@ -30345,9 +30356,13 @@ av_scanner = cmdline:\
 .endd
 .vitem &%drweb%&
 .cindex "virus scanners" "DrWeb"
-The DrWeb daemon scanner (&url(http://www.sald.com/)) interface takes one
-argument, either a full path to a UNIX socket, or an IP address and port
-separated by white space, as in these examples:
+The DrWeb daemon scanner (&url(http://www.sald.com/)) interface
+takes one option,
+either a full path to a UNIX socket,
+or host and port specifiers separated by white space.
+The host may be a name or an IP address; the port is either a
+single number or a pair of numbers with a dash between.
+For example:
 .code
 av_scanner = drweb:/var/run/drwebd.sock
 av_scanner = drweb:192.168.2.20 31337
@@ -30355,6 +30370,17 @@ av_scanner = drweb:192.168.2.20 31337
 If you omit the argument, the default path &_/usr/local/drweb/run/drwebd.sock_&
 is used. Thanks to Alex Miller for contributing the code for this scanner.
 
+.vitem &%f-protd%&
+.cindex "virus scanners" "f-protd"
+The f-protd scanner is accessed via HTTP over TCP.
+One argument is taken, being a space-separated hostname and port number
+(or port-range).
+For example:
+.code
+av_scanner = f-protd:localhost 10200-10204
+.endd
+If you omit the argument, the default values show above are used.
+
 .vitem &%fsecure%&
 .cindex "virus scanners" "F-Secure"
 The F-Secure daemon scanner (&url(http://www.f-secure.com)) takes one