1.3 struct lifreq
1.4 signal-based resolver timeouts
1.5 get rid of PATH_MAX
+ 1.6 progress callback without doubles
2. libcurl - multi interface
2.1 More non-blocking
we need libssh2 to properly tell us when we pass in a too small buffer and
its current API (as of libssh2 1.2.7) doesn't.
+1.6 progress callback without doubles
+
+ The progress callback was introduced way back in the days and the choice to
+ use doubles in the arguments was possibly good at the time. Today the doubles
+ only confuse users and make the amounts less precise. We should introduce
+ another progress callback option that take precedence over the old one and
+ have both co-exist for a forseeable time until we can remove the double-using
+ one.
+
2. libcurl - multi interface
2.1 More non-blocking