Version 2, June 1991

 Copyright (c) 1989, 199t Free Software Foundation, Inc.,
sl Franktin Street, Fifth FLoor, Boston, MA 02118-1361 USA
 Everyone ls permitted to copy and distribute verbatim copies
 of this License document, but changing it is not atlowed.


  The licenses for most software are designed to take away your
freedom to 5hare and change it.  By contrast, the GNU GeneraL Pubtic
License i5 intended to guarantee your freedom to share and change free
50ftware--t0 make 5ure the 50rtware is free for aLl it5 users.  This
GeneraL PubLic License appLies to most of the Free Software
Foundation'5 software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation softNare is covered by
the GNU Lesser General Public License instead.)  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General PubLlc Licenses are deslgned to make sure that you
have the freedom to distribute copies of free software (and charge for
thi5 5ervice if you wish), that you recelve source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do the5e thing5.

  To pro_ect your rlghts, we need to make re5trlctions that forbid
anyone to deny you these rights or to ask you to surrender the right5.
These re5triction5 tran5tate to certain responsibilitie5 for you if you
di5tribute copies of the software, or if you modify it.

  For exampLe, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients aLl the rights tha_
you have.  You must make sure that they, too, receive or can get the
source code.  And you must 5h0w them these terms 50 they know their
rights ,

He protect your rights with two step5: (l) copyright the software, and
(2) offer you this ticen5e which gives you legal permt5sion to copy,
distribute and/or modify the software.

ALso, for each author'5 protection and ours, we want to make certain
that everyone under5tands that there is no warranty ror thi5 free
50ftware .  If the software is modified by someone eL5e and pa5sed on, we
want its recipients to know that what they have is not the original, so
that any probLem5 introduced by others will not refLect on the originaL
authors' reputations.

FinaLLy, any free program ts threa_ened constantly by software
patent5. we wish to avoid the daflger that redistributor5 of a rree
program wLLL individuaLty obtaln patent Licen5es, in effect making the
program proprietary.  To prevent this, we have made lt clear that any
patent must be Licensed for everyone's free u5e or not licen5ed at all.

  The precise terms and conditions for copying, dis_ribution and
modification folLow.