Cleanup and documentation updates:

- Remove shared/str.h where not used.
- Remove shared/debug.h from all files as it has been completely replaced
  by shared/report.h (it will be removed later).
- Add more doxygen comments to shared/* and clients/lcdproc/*.
- Include static functions in doxygen output.

server/drivers/hd44780-lis2.c

@@ -401,8 +401,8 @@ static void setLIS2Fans(int fd, int fan1, int fan2, int fan3, int fan4)
 
 /**
  * Write a character.
- * \param fd  File handle to write to.
- * \param ch  Character to write.
+ * \param fd    File handle to write to.
+ * \param code  Character to write.
  */
 static void writeChar(int fd, unsigned char code)
 {