data(hanja): words, not only syllables

The import kept only readings of one syllable, so the Hanja search could
convert 한 but never 한자, 학교, or 대한민국 — the conversion every other
Korean input method offers.  libhangul's table has 187k readings; both
scripts now keep them all, and the search finds a word as readily as a
syllable.  The daemon pays for it: 24 MB instead of 12, and 170 ms to
start instead of 30.

map/mkhanja

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Write hanja.dict from a one-Hanja-per-row UTF-8 source."""
+"""Write hanja.dict from a Hanja-per-row UTF-8 source."""
 
 import sys
 from pathlib import Path
@@ -10,16 +10,13 @@ MAXCANDIDATES = 128
 
 
 def ishangul(s):
-    return len(s) == 1 and 0xAC00 <= ord(s) <= 0xD7A3
+    return s != "" and all(0xAC00 <= ord(c) <= 0xD7A3 for c in s)
 
 
 def ishanja(s):
-    if len(s) != 1:
-        return False
-    c = ord(s)
-    return (0x3400 <= c <= 0x4DBF
-            or 0x4E00 <= c <= 0x9FFF
-            or 0xF900 <= c <= 0xFAFF)
+    return s != "" and all(0x3400 <= ord(c) <= 0x4DBF
+                           or 0x4E00 <= ord(c) <= 0x9FFF
+                           or 0xF900 <= ord(c) <= 0xFAFF for c in s)
 
 
 def read(path):
@@ -42,9 +39,9 @@ def read(path):
                 raise ValueError(f"{path}:{lineno}: need Hanja<TAB>reading")
             hanja, reading = fields
             if not ishanja(hanja):
-                raise ValueError(f"{path}:{lineno}: need one BMP Hanja character")
+                raise ValueError(f"{path}:{lineno}: need BMP Hanja")
             if not ishangul(reading):
-                raise ValueError(f"{path}:{lineno}: need one Hangul syllable")
+                raise ValueError(f"{path}:{lineno}: need Hangul syllables")
             pair = (hanja, reading)
             if pair in seen:
                 raise ValueError(f"{path}:{lineno}: duplicate Hanja reading")