Patch to make Turks happy.

Hi,

Yet another problem with Turkish encoding. clean_encoding_name()
in src/backend/utils/mb/encnames.c uses tolower() to convert locale
names to lower-case. This causes errors if locale name contains
capital "I" and current olcale is Turkish. Some examples:

aaa=# \l
List of databases
Name | Owner | Encoding
-----------+-------+----------
aaa | pgsql | LATIN5
bbb | pgsql | LATIN5
template0 | pgsql | LATIN5
template1 | pgsql | LATIN5
(4 rows)
aaa=# CREATE DATABASE ccc ENCODING='LATIN5';
ERROR: LATIN5 is not a valid encoding name
aaa=# \encoding
SQL_ASCII
aaa=# \encoding SQL_ASCII
SQL_ASCII: invalid encoding name or conversion procedure not found
aaa=# \encoding LATIN5
LATIN5: invalid encoding name or conversion procedure not found

Patch, is a simple change to use ASCII-only lower-case conversion
instead of locale-dependent tolower()

Best regards,
Nic.

*** ./src/backend/utils/mb/encnames.c.orig Mon Dec 2 15:58:49 2002
--- ./src/backend/utils/mb/encnames.c Mon Dec 2 18:13:23 2002
***************
*** 407,413 ****
for (p = key, np = newkey; *p != '\0'; p++)
{
if (isalnum((unsigned char) *p))
! *np++ = tolower((unsigned char) *p);
}
*np = '\0';
return newkey;
--- 407,416 ----
for (p = key, np = newkey; *p != '\0'; p++)
{
if (isalnum((unsigned char) *p))
! if (*p >= 'A' && *p <= 'Z')
! *np++ = *p + 'a' - 'A';
! else
! *np++ = *p;
}
*np = '\0';
return newkey;