Add some additional SEE ALSO references.

In the pcap_list_datalinks() man page, refer to the
pcap_datalink_val_to_name() man page, as the routines described there
can be used to print out names and descriptive text for the values
returned by pcap_list_datalinks().

In the pcap_set_datalink() man page, refer to the
pcap_datalink_name_to_val() man page, as pcap_datalink_name_to_val() can
be used to convert a name for a link-layer header type into a value to
be handed to pcap_set_datalink().

Update the change date on some man pages while we're at it.

pcap_can_set_rfmon.3pcap

@@ -19,7 +19,7 @@
 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 .\"
-.TH PCAP_CAN_SET_RFMON 3PCAP "5 April 2008"
+.TH PCAP_CAN_SET_RFMON 3PCAP "18 May 2010"
 .SH NAME
 pcap_can_set_rfmon \- check whether monitor mode can be set for a
 not-yet-activated capture handle

pcap_findalldevs.3pcap

@@ -19,7 +19,7 @@
 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 .\"
-.TH PCAP_FINDALLDEVS 3PCAP "5 April 2008"
+.TH PCAP_FINDALLDEVS 3PCAP "22 August 2010"
 .SH NAME
 pcap_findalldevs, pcap_freealldevs \- get a list of capture devices, and
 free that list

pcap_list_datalinks.3pcap.in

@@ -19,7 +19,7 @@
 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 .\"
-.TH PCAP_LIST_DATALINKS 3PCAP "5 April 2008"
+.TH PCAP_LIST_DATALINKS 3PCAP "22 August 2010"
 .SH NAME
 pcap_list_datalinks, pcap_free_datalinks \- get a list of link-layer header
 types supported by a capture device, and free that list
@@ -59,4 +59,6 @@ may be called with
 .I p
 as an argument to fetch or display the error text.
 .SH SEE ALSO
-pcap(3PCAP), pcap_geterr(3PCAP), pcap-linktype(@MAN_MISC_INFO@)
+pcap(3PCAP), pcap_geterr(3PCAP),
+pcap_datalink_val_to_name(3PCAP),
+pcap-linktype(@MAN_MISC_INFO@)

pcap_set_datalink.3pcap

@@ -19,7 +19,7 @@
 .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 .\"
-.TH PCAP_SET_DATALINK 3PCAP "5 April 2008"
+.TH PCAP_SET_DATALINK 3PCAP "22 August 2010"
 .SH NAME
 pcap_set_datalink \- set the link-layer header type to be used by a
 capture device
@@ -49,4 +49,5 @@ may be called with
 .I p
 as an argument to fetch or display the error text.
 .SH SEE ALSO
-pcap(3PCAP), pcap_geterr(3PCAP)
+pcap(3PCAP), pcap_geterr(3PCAP),
+pcap_datalink_name_to_val(3PCAP)