Function svn_stringbuf_appendbytes 

pub unsafe extern "C" fn svn_stringbuf_appendbytes(
    targetstr: *mut svn_stringbuf_t,
    bytes: *const c_char,
    count: apr_size_t,
)

Append the array of bytes @a bytes of length @a count onto @a targetstr.

Reallocs if necessary. @a targetstr is affected, nothing else is.

@since 1.9 @a bytes can be NULL if @a count is zero.