[tz] Question regarding zone Asia/Seoul DST rules 1948-1951

[Alois Treindl]

For South Korea, TZ has rules covering the years 1948 - 1988, and the 
text comments
confirm that they were applied in 1948.

Rule    ROK     1948    only    -       Jun      1 0:00   1:00    D
Rule    ROK     1948    only    -       Sep     12 24:00   0       S
Rule    ROK     1949    only    -       Apr      3 0:00   1:00    D
Rule    ROK     1949    1951    -       Sep Sat>=7  24:00   0       S
Rule    ROK     1950    only    -       Apr      1 0:00   1:00    D
Rule    ROK     1951    only    -       May      6 0:00   1:00    D
Rule    ROK     1955    only    -       May      5 0:00   1:00    D
Rule    ROK     1955    only    -       Sep      8 24:00   0       S
Rule    ROK     1956    only    -       May     20 0:00   1:00    D
Rule    ROK     1956    only    -       Sep     29 24:00   0       S
Rule    ROK     1957    1960    -       May Sun>=1   0:00   1:00    D
Rule    ROK     1957    1960    -       Sep Sat>=17 24:00   0       S
Rule    ROK     1987    1988    -       May Sun>=8   2:00   1:00    D
Rule    ROK     1987    1988    -       Oct Sun>=8   3:00   0       S

But the zone data apply only rules from 1954 onwards while those for 
1948-51 are ignored.
Why is this so?

This may be an error made in 2014, when the ROK rules for 1948-1959 were 
added,
but it was forgotten to enter ROK into the 1954 line.

Zone    Asia/Seoul      8:27:52 -       LMT     1908 Apr  1
                         8:30    -       KST     1912 Jan 1
                         9:00    -       JST     1945 Sep 8
                         9:00    -       KST     1954 Mar 21
                         8:30    ROK     K%sT    1961 Aug 10
                         9:00    ROK     K%sT

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