apr_indexof, apr_ftoa, etc

[Graf László]

Hello,

I would like to know if you intend to introduce more, in my oppinion, 
useful methods in apr_strings.h.

For example:

APR_DECLARE(char *) apr_ftoa(apr_pool_t *p, float n);
APR_DECLARE(char *) apr_dtoa(apr_pool_t *p, double n);
APR_DECLARE(int) apr_indexof(apr_pool_t *p, char *string, char *pattern);
APR_DECLARE(char *) apr_substring(apr_pool_t *p, char *string, int 
offset, int length);

Thanks,

László Graf