Remove undocumented and obsolete -T option.  It was intended for
use with old netnews.

Index: usr.bin/mail/glob.h
===================================================================
--- usr.bin/mail/glob.h.orig
+++ usr.bin/mail/glob.h
@@ -40,7 +40,6 @@
 int	msgCount;			/* Count of messages read in */
 int	rcvmode;			/* True if receiving mail */
 int	sawcom;				/* Set after first command */
-char	*Tflag;				/* -T temp file for netnews */
 int	senderr;			/* An error while checking */
 int	edit;				/* Indicates editing a file */
 int	readonly;			/* Will be unable to rewrite file */
Index: usr.bin/mail/main.c
===================================================================
--- usr.bin/mail/main.c.orig
+++ usr.bin/mail/main.c
@@ -78,18 +78,8 @@ main(int argc, char **argv)
 	bcc = NULL;
 	smopts = NULL;
 	subject = NULL;
-	while ((i = getopt(argc, argv, "EINT:b:c:dfins:u:v")) != -1) {
+	while ((i = getopt(argc, argv, "EIN:b:c:dfins:u:v")) != -1) {
 		switch (i) {
-		case 'T':
-			/*
-			 * Next argument is temp file to write which
-			 * articles have been read/deleted for netnews.
-			 */
-			Tflag = optarg;
-			if ((i = creat(Tflag, 0600)) < 0)
-				err(1, "%s", Tflag);
-			(void)close(i);
-			break;
 		case 'u':
 			/*
 			 * Next argument is person to pretend to be.
Index: usr.bin/mail/quit.c
===================================================================
--- usr.bin/mail/quit.c.orig
+++ usr.bin/mail/quit.c
@@ -64,7 +64,7 @@ int
 quit(void)
 {
 	int mcount, p, modify, autohold, anystat, holdbit, nohold;
-	FILE *ibuf = NULL, *obuf, *fbuf, *rbuf, *readstat = NULL, *abuf;
+	FILE *ibuf = NULL, *obuf, *fbuf, *rbuf, *abuf;
 	struct message *mp;
 	int c, fd;
 	struct stat minfo;
@@ -154,10 +154,6 @@ quit(void)
 			mp->m_flag |= holdbit;
 	}
 	modify = 0;
-	if (Tflag != NULL) {
-		if ((readstat = Fopen(Tflag, "w")) == NULL)
-			Tflag = NULL;
-	}
 	for (c = 0, p = 0, mp = &message[0]; mp < &message[msgCount]; mp++) {
 		if (mp->m_flag & MBOX)
 			c++;
@@ -165,15 +161,7 @@ quit(void)
 			p++;
 		if (mp->m_flag & MODIFY)
 			modify++;
-		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
-			char *id;
-
-			if ((id = hfield("article-id", mp)) != NULL)
-				fprintf(readstat, "%s\n", id);
-		}
 	}
-	if (Tflag != NULL)
-		(void)Fclose(readstat);
 	if (p == msgCount && !modify && !anystat) {
 		printf("Held %d message%s in %s\n",
 			p, p == 1 ? "" : "s", mailname);
@@ -399,17 +387,13 @@ edstop(void)
 {
 	int gotcha, c;
 	struct message *mp;
-	FILE *obuf, *ibuf, *readstat = NULL;
+	FILE *obuf, *ibuf;
 	struct stat statb;
 	char tempname[PATHSIZE];
 
 	if (readonly)
 		return(0);
 	holdsigs();
-	if (Tflag != NULL) {
-		if ((readstat = Fopen(Tflag, "w")) == NULL)
-			Tflag = NULL;
-	}
 	for (mp = &message[0], gotcha = 0; mp < &message[msgCount]; mp++) {
 		if (mp->m_flag & MNEW) {
 			mp->m_flag &= ~MNEW;
@@ -417,16 +401,8 @@ edstop(void)
 		}
 		if (mp->m_flag & (MODIFY|MDELETED|MSTATUS))
 			gotcha++;
-		if (Tflag != NULL && (mp->m_flag & (MREAD|MDELETED)) != 0) {
-			char *id;
-
-			if ((id = hfield("article-id", mp)) != NULL)
-				fprintf(readstat, "%s\n", id);
-		}
 	}
-	if (Tflag != NULL)
-		(void)Fclose(readstat);
-	if (!gotcha || Tflag != NULL)
+	if (!gotcha)
 		goto done;
 	ibuf = NULL;
 	if (stat(mailname, &statb) >= 0 && statb.st_size > mailsize) {
Index: usr.bin/mail/mail.1
===================================================================
--- usr.bin/mail/mail.1.orig
+++ usr.bin/mail/mail.1
@@ -1202,10 +1202,6 @@ This man page is derived from the
 .%T "Mail Reference Manual"
 originally written by Kurt Shoens.
 .Sh BUGS
-There are some flags that are not documented here.
-Most are
-not useful to the general user.
-.Pp
 Usually,
 .Nm mail
 and