Add mblower and mbupper functions.

These are Unicode-safe versions of lower() and upper()

tests/manpage-personal-dict

@@ -687,10 +687,12 @@ maxlen
 maybexs
 mbchar
 mbindex
+mblower
 mbpad
 mbstowcs
 mbstrlen
 mbsubstr
+mbupper
 md
 memcpy
 messageBox

tests/test.cmp

@@ -16767,7 +16767,11 @@ mbpad("
 ../tests/test.rem(1902): Invalid value for system variable
 ../tests/test.rem(1903): Invalid value for system variable
 ../tests/test.rem(1904): Invalid value for system variable
-DynBuf Mallocs: 1124 mallocs; 31872896 bytes
+mbupper("öÖçÇéôñÑÉÊ") => "ÖÖÇÇÉÔÑÑÉÊ"
+mblower("öÖçÇéôñÑÉÊ") => "ööççéôññéê"
+upper("öÖçÇéôñÑÉÊ") => "öÖçÇéôñÑÉÊ"
+lower("öÖçÇéôñÑÉÊ") => "öÖçÇéôñÑÉÊ"
+DynBuf Mallocs: 1132 mallocs; 31873408 bytes
 Variable hash table statistics:
   Entries: 100146; Buckets: 87719; Non-empty Buckets: 66303
   Maxlen: 5; Minlen: 0; Avglen: 1.142; Stddev: 0.878; Avg nonempty len: 1.510
@@ -16789,7 +16793,7 @@ Expression nodes high-water: 302076
     Expression nodes leaked: 0
      Parse level high-water: 34
 Max expr node evaluations per line: 2001
-Total expression node evaluations:  106738
+Total expression node evaluations:  106746
 
 Test 2
 
@@ -24776,9 +24780,11 @@ lower
 max
 mbchar
 mbindex
+mblower
 mbpad
 mbstrlen
 mbsubstr
+mbupper
 min
 minsfromutc
 minute

tests/test.rem

@@ -1903,6 +1903,14 @@ SET $TimeSep "FOO"
 SET $DateSep "BAR"
 SET $DefaultColor "My oh my, what lovely eyes!"
 
+# mbupper and mblower
+DEBUG +x
+SET a mbupper("öÖçÇéôñÑÉÊ")
+SET a mblower("öÖçÇéôñÑÉÊ")
+SET a upper("öÖçÇéôñÑÉÊ")
+SET a lower("öÖçÇéôñÑÉÊ")
+DEBUG -x
+
 # Don't want Remind to queue reminders
 EXIT