Add Doug McIlroy as author of calendar, tee, tsort

According to https://www.cs.dartmouth.edu/~doug/:
Some things I have worked on:
[...]
Unix programs: spell, diff, sort, join, graph, speak, tr, tsort, calendar, echo, tee, etc.

Found in Brian Kernighan: UNIX A History and a Memoir, p. 83

Author: dspinellis

src/author-path/Research-V5

@@ -65,7 +65,9 @@ usr/source/s1/fed..\.s	rhm,ken
 usr/source/s1/form.\.s	rhm,ken
 
 # From Doug McIlroy email 2016-12-03
+# https://www.cs.dartmouth.edu/~doug/
 usr/source/s1/echo\.c	doug
+usr/source/s2/tee\.c	doug
 usr/source/s2/tr\.c	doug
 
 # Default

src/author-path/Research-V6

@@ -137,6 +137,7 @@ usr/doc/man/man1/tty\.1		dmr,ken
 usr/doc/man/man1/who\.1		dmr,ken
 usr/doc/man/man1/write\.1	dmr,ken
 usr/doc/man/man1/diff\.1	doug
+usr/doc/man/man1/tee\.1		doug
 usr/doc/man/man1/sort\.1	ken,doug
 usr/doc/man/man1/wc\.1		jfo
 usr/doc/man/man1/bas\.1		ken
@@ -171,6 +172,9 @@ usr/doc/man/man1/tr\.1		doug
 usr/doc/man/man1/spell\.1	scj,doug,rje
 usr/doc/man/man3/alloc\.3	doug
 
+# https://www.cs.dartmouth.edu/~doug/
+usr/source/s2/tee\.c		doug
+
 # Default
 # Regarding the order of names
 # "The reader will not, on the average, go far wrong if he reads each

src/author-path/Research-V7

@@ -186,6 +186,7 @@ usr/man/man1/cal\.1		ken
 usr/man/man1/mail\.1		ken
 usr/man/man1/diff.*		doug
 usr/man/man1/graph\.1g		doug
+usr/man/man1/tee\.1		doug
 usr/man/man1/join\.1		doug
 usr/man/man1/spell\.1		scj,doug,rje
 usr/man/man1/crypt\.1		rhm
@@ -266,6 +267,7 @@ usr/man/man1/fgrep\.1		aho
 # From Doug McIlroy email 2016-12-03
 usr/man/man1/echo\.1		doug
 usr/src/cmd/echo\.c		doug
+usr/src/cmd/tee\.c		doug
 usr/man/man1/tr\.1		doug
 usr/src/cmd/tr\.c		doug
 
@@ -277,6 +279,13 @@ usr/man/man3/.*			dmr
 usr/man/man3/malloc\.3		doug
 usr/src/libc/gen/malloc\.c	doug
 
+# https://www.cs.dartmouth.edu/~doug/
+bin/calendar			doug
+usr/man/man1/calendar\.1	doug
+usr/src/cmd/calendar\.c		doug
+usr/man/man1/tsort\.1		doug
+usr/src/cmd/tsort\.c		doug
+
 # Default
 # Regarding the order of names
 # "The reader will not, on the average, go far wrong if he reads each