prepare notes for 0.7.8 release

WHATSNEW

@@ -154,3 +154,21 @@ signals, as required by POSIX.
 
 added many compatibility and system-level interfaces, increasing the
 proportion of busybox that works with musl.
+
+
+
+0.7.8 (pending release) - more bug fixes
+
+fixed problems with ipv6 dns and address printing code that made ipv6
+support practically unusable, and some other getaddrinfo bugs.
+
+fixed broken sendmsg/recvmsg functions on x86_64 (caused by incorrect
+msghdr structure).
+
+fixed broken sigsetjmp asm on x86_64.
+
+worked around a problem with input buffering on terminals reblocking
+after getting a blank line, due to a bug in the linux readv syscall.
+
+various improvements to the "rsyscall" system used to implement
+threaded setuid, setgid, etc.