Declare msStringInitCap() and msStringFirstCap(), and add doc

Author: rouault

mapserver.h

@@ -2113,6 +2113,8 @@ void msPopulateTextSymbolForLabelAndString(textSymbolObj *ts, labelObj *l, char
   MS_DLL_EXPORT char *msIntToString(int value);
   MS_DLL_EXPORT void msStringToUpper(char *string);
   MS_DLL_EXPORT void msStringToLower(char *string);
+  MS_DLL_EXPORT void msStringInitCap(char *string);
+  MS_DLL_EXPORT void msStringFirstCap(char *string);
   MS_DLL_EXPORT int msEncodeChar(const char);
   MS_DLL_EXPORT char *msEncodeUrlExcept(const char*, const char);
   MS_DLL_EXPORT char *msEncodeUrl(const char*);

mapstring.c

@@ -414,6 +414,10 @@ void msStringToLower(char *string)
   }
 }
 
+/**
+ * Force the first character to uppercase and the rest of the characters to
+ * lower case for EACH word in the string.
+ */
 void msStringInitCap(char *string)
 {
   int i;
@@ -433,6 +437,10 @@ void msStringInitCap(char *string)
   }
 }
 
+/**
+ * Force the first character to uppercase for the FIRST word in the string
+ * and the rest of the characters to lower case.
+ */
 void msStringFirstCap(char *string)
 {
   int i;