errno changes, lib major version bumps, and general flag day

To build you must:
cd /usr/src && make obj && make includes
cd lib/libc && make depend && make && NOMAN=1 sudo make install
cd /usr/src && make build

src/lib/libutil/shlib_version

@@ -1,2 +1,2 @@
-major=10
+major=11
 minor=0