Lack of docs for libpq C Library

[Pavel Golub <pavel(at)microolap(dot)com>]

Hello, pgsql-docs.

I noticed that some exported functions are not documented in the
Chapter 30. However, there are some info about them in other chapters,
e.g. PQclientEncoding using is described in chapter 22.2.3 "Automatic
Character Set Conversion Between Server and Client".

This is the list of exported functions without docs:
================
PQclientEncoding
PQsetClientEncoding
PQconninfoFree
PQdsplen
PQenv2encoding
PQinitSSL
PQmblen
PQregisterThreadLock
appendPQExpBuffer
appendPQExpBufferChar
appendPQExpBufferStr
createPQExpBuffer
destroyPQExpBuffer
enlargePQExpBuffer
initPQExpBuffer
appendBinaryPQExpBuffer
pg_char_to_encoding
pg_encoding_to_char
pg_utf_mblen
pg_valid_server_encoding
pgresStatus
pqsignal
printfPQExpBuffer
resetPQExpBuffer
termPQExpBuffer

For me as a developer this is extremely important info.

Thanks for understanding.

-- 
With best wishes,
 Pavel                          mailto:pavel(at)gf(dot)microolap(dot)com