Make more small fixups to the man pages.

Among other things make sure a reference to pcap(3PCAP) is in the
SEE ALSO section of every man page by default.

[skip ci]
diff --git a/pcap-linktype.manmisc.in b/pcap-linktype.manmisc.in
index 68919a7..777e9dc 100644
--- a/pcap-linktype.manmisc.in
+++ b/pcap-linktype.manmisc.in
@@ -45,4 +45,4 @@
 The link-layer header types supported by libpcap are described at
 https://www.tcpdump.org/linktypes.html.
 .SH SEE ALSO
-pcap_datalink(3PCAP)
+pcap(3PCAP)
diff --git a/pcap-savefile.manfile.in b/pcap-savefile.manfile.in
index 451dd90..748d7af 100644
--- a/pcap-savefile.manfile.in
+++ b/pcap-savefile.manfile.in
@@ -130,4 +130,4 @@
 will be equal if the number of bytes of packet data are less than or
 equal to the snapshot length.
 .SH SEE ALSO
-pcap(3PCAP), pcap-linktype(@MAN_MISC_INFO@)
+pcap(3PCAP)
diff --git a/pcap-tstamp.manmisc.in b/pcap-tstamp.manmisc.in
index 12405c8..6437e80 100644
--- a/pcap-tstamp.manmisc.in
+++ b/pcap-tstamp.manmisc.in
@@ -164,3 +164,5 @@
 the time stamp supplied by the hardware or operating system and, when
 reading a savefile, this does not indicate the actual precision of time
 stamps in the file.
+.SH SEE ALSO
+pcap(3PCAP)
diff --git a/pcap_datalink_val_to_name.3pcap b/pcap_datalink_val_to_name.3pcap
index fad350f..efdbfc6 100644
--- a/pcap_datalink_val_to_name.3pcap
+++ b/pcap_datalink_val_to_name.3pcap
@@ -52,3 +52,5 @@
 is returned if the type value does not correspond to a known
 .B DLT_
 value.
+.SH SEE ALSO
+pcap(3PCAP)
diff --git a/pcap_dump_open.3pcap.in b/pcap_dump_open.3pcap.in
index 10e6879..21b4de5 100644
--- a/pcap_dump_open.3pcap.in
+++ b/pcap_dump_open.3pcap.in
@@ -69,7 +69,7 @@
 .PP
 .B pcap_dump_open_append()
 is like
-.B pcap_dump_open
+.B pcap_dump_open()
 but does not create the file if it does not exist and, if it does
 already exist, and is a pcap file with the same byte order as the host
 opening the file, and has the same time stamp precision, link-layer
diff --git a/pcap_file.3pcap b/pcap_file.3pcap
index 584b528..981451b 100644
--- a/pcap_file.3pcap
+++ b/pcap_file.3pcap
@@ -35,7 +35,9 @@
 returns the standard I/O stream of the ``savefile,'' if a ``savefile''
 was opened with
 .BR pcap_open_offline(3PCAP) ,
-or NULL, if a network device was opened with
+or
+.BR NULL ,
+if a network device was opened with
 .B pcap_create(3PCAP)
 and
 .BR \%pcap_activate(3PCAP) ,
diff --git a/pcap_open_live.3pcap b/pcap_open_live.3pcap
index 942d4fc..3286e29 100644
--- a/pcap_open_live.3pcap
+++ b/pcap_open_live.3pcap
@@ -87,4 +87,4 @@
 .B PCAP_ERRBUF_SIZE
 chars.
 .SH SEE ALSO
-pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP)
+pcap_create(3PCAP), pcap_activate(3PCAP)
diff --git a/pcap_strerror.3pcap b/pcap_strerror.3pcap
index ae2216e..a5775f4 100644
--- a/pcap_strerror.3pcap
+++ b/pcap_strerror.3pcap
@@ -36,3 +36,5 @@
 .BR strerror (3)
 isn't available.  It returns an error message string corresponding to
 .IR error .
+.SH SEE ALSO
+pcap(3PCAP)