This simplifies the docs and makes it easier to cut/paste command lines.

Remove lots of outdated information that is duplicated by the
better-maintained SGML documentation.  In particular, remove the
outdated listing of contrib modules.  Update the installation
instructions to mention CREATE EXTENSION, but don't go into too much
detail.

For consistency, have all non-ASCII characters from contributors'
names in the source be in UTF-8.  But remove some other more
gratuitous uses of non-ASCII characters.

This is both very useful in its own right, and an important test case
for the core FDW support.

This commit includes a small refactoring of copy.c to expose its option
checking code as a separately callable function.  The original patch
submission duplicated hundreds of lines of that code, which seemed pretty
unmaintainable.

Shigeru Hanada, reviewed by Itagaki Takahiro and Tom Lane

This is still pretty rough - among other things, the documentation
needs work, and the messages need a visit from the style police -
but this gets the basic framework in place.

KaiGai Kohei

Actually rename the program, rather than just claiming we did.  Hook it
into the build system.  Get rid of useless dependency on libpq.  Clean up
#include list and messy whitespace.

Fujii Masao

KaiGai Kohei, with a few changes by me.

on the buildfarm.