termios.3: Add names of terminal special characters

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/termios.3

@@ -478,7 +478,7 @@ is set, and then not passed as input.
 .TP
 .B VDSUSP
 (not in POSIX; not supported under Linux; 031, EM, Ctrl-Y)
-Delayed suspend character:
+Delayed suspend character (DSUSP):
 send
 .B SIGTSTP
 signal when the character is read by the user program.
@@ -491,7 +491,7 @@ job control, and then not passed as input.
 .TP
 .B VEOF
 (004, EOT, Ctrl-D)
-End-of-file character.
+End-of-file character (EOF).
 More precisely: this character causes the pending tty buffer to be sent
 to the waiting user program without waiting for end-of-line.
 If it is the first character of the line, the
@@ -503,21 +503,21 @@ is set, and then not passed as input.
 .TP
 .B VEOL
 (0, NUL)
-Additional end-of-line character.
+Additional end-of-line character (EOL).
 Recognized when
 .B ICANON
 is set.
 .TP
 .B VEOL2
 (not in POSIX; 0, NUL)
-Yet another end-of-line character.
+Yet another end-of-line character (EOL2).
 Recognized when
 .B ICANON
 is set.
 .TP
 .B VERASE
 (0177, DEL, rubout, or 010, BS, Ctrl-H, or also #)
-Erase character.
+Erase character (ERASE).
 This erases the previous not-yet-erased character,
 but does not erase past EOF or beginning-of-line.
 Recognized when
@@ -526,7 +526,7 @@ is set, and then not passed as input.
 .TP
 .B VINTR
 (003, ETX, Ctrl-C, or also 0177, DEL, rubout)
-Interrupt character.
+Interrupt character (INTR).
 Send a
 .B SIGINT
 signal.
@@ -536,7 +536,7 @@ is set, and then not passed as input.
 .TP
 .B VKILL
 (025, NAK, Ctrl-U, or Ctrl-X, or also @)
-Kill character.
+Kill character (KILL).
 This erases the input since the last EOF or beginning-of-line.
 Recognized when
 .B ICANON
@@ -544,7 +544,7 @@ is set, and then not passed as input.
 .TP
 .B VLNEXT
 (not in POSIX; 026, SYN, Ctrl-V)
-Literal next.
+Literal next (LNEXT).
 Quotes the next input character, depriving it of
 a possible special meaning.
 Recognized when
@@ -552,11 +552,11 @@ Recognized when
 is set, and then not passed as input.
 .TP
 .B VMIN
-Minimum number of characters for noncanonical read.
+Minimum number of characters for noncanonical read (MIN).
 .TP
 .B VQUIT
 (034, FS, Ctrl-\e)
-Quit character.
+Quit character (QUIT).
 Send
 .B SIGQUIT
 signal.
@@ -566,7 +566,7 @@ is set, and then not passed as input.
 .TP
 .B VREPRINT
 (not in POSIX; 022, DC2, Ctrl-R)
-Reprint unread characters.
+Reprint unread characters (REPRINT).
 Recognized when
 .B ICANON
 and
@@ -575,7 +575,7 @@ are set, and then not passed as input.
 .TP
 .B VSTART
 (021, DC1, Ctrl-Q)
-Start character.
+Start character (START).
 Restarts output stopped by the Stop character.
 Recognized when
 .B IXON
@@ -593,7 +593,7 @@ signal (not supported on Linux) to the foreground process group.
 .TP
 .B VSTOP
 (023, DC3, Ctrl-S)
-Stop character.
+Stop character (STOP).
 Stop output until Start character typed.
 Recognized when
 .B IXON
@@ -601,7 +601,7 @@ is set, and then not passed as input.
 .TP
 .B VSUSP
 (032, SUB, Ctrl-Z)
-Suspend character.
+Suspend character (SUSP).
 Send
 .B SIGTSTP
 signal.
@@ -611,15 +611,15 @@ is set, and then not passed as input.
 .TP
 .B VSWTCH
 (not in POSIX; not supported under Linux; 0, NUL)
-Switch character.
+Switch character (SWTCH).
 (Used by \fBshl\fP only.)
 .TP
 .B VTIME
-Timeout in deciseconds for noncanonical read.
+Timeout in deciseconds for noncanonical read (TIME).
 .TP
 .B VWERASE
 (not in POSIX; 027, ETB, Ctrl-W)
-Word erase.
+Word erase (WERASE).
 Recognized when
 .B ICANON
 and