pgsql: Remove copyright notices from Jan (per author approval), and - Mailing list pgsql-committers

Log Message:
-----------
Remove copyright notices from Jan (per author approval), and those files
derived from Jan's.

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        ruleutils.c (r1.214 -> r1.215)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c.diff?r1=1.214&r2=1.215)
    pgsql/src/pl/plperl:
        plperl.c (r1.104 -> r1.105)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plperl/plperl.c.diff?r1=1.104&r2=1.105)
    pgsql/src/pl/plpython:
        plpython.c (r1.74 -> r1.75)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/plpython/plpython.c.diff?r1=1.74&r2=1.75)
    pgsql/src/pl/tcl:
        pltcl.c (r1.99 -> r1.100)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/tcl/pltcl.c.diff?r1=1.99&r2=1.100)

Removed Files:
-------------
    pgsql/src/pl/tcl:
        license.terms
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/pl/tcl/license.terms)