Indent the postgresql stuff consistently like the rest of the file

configure.in

@@ -6121,11 +6121,11 @@ dnl ===================================================================
 if test "x$enable_postgresql_sdbc" != "xno"; then
     SCPDEFS="$SCPDEFS -DWITH_POSTGRESQL_SDBC"
 
-# if/when anything else than PostgreSQL uses Kerberos,
-# move this out of `test "x$enable_postgresql_sdbc" != "xno"'
-WITH_KRB5=NO
-WITH_GSSAPI=no
-case "$_os" in
+    # if/when anything else than PostgreSQL uses Kerberos,
+    # move this out of `test "x$enable_postgresql_sdbc" != "xno"'
+    WITH_KRB5=NO
+    WITH_GSSAPI=no
+    case "$_os" in
     Darwin)
         # MacOS X has system MIT Kerberos 5 since 10.4
         if test "$with_krb5" != "no"; then
@@ -6159,7 +6159,7 @@ case "$_os" in
             AC_SEARCH_LIBS(gss_init_sec_context, [gssapi_krb5 gss 'gssapi -lkrb5 -lcrypto'], [],
                 [AC_MSG_ERROR([could not find function 'gss_init_sec_context' required for GSSAPI])])
         fi
-esac
+    esac
 
     AC_MSG_CHECKING([PostgreSQL C interface])
     if test "$with_system_postgresql" = "yes"; then