util-lib: split out allocation calls into alloc-util.[ch]

tree-wide: use coccinelle to patch a lot of code to use mfree() This replaces this: free(p); p = NULL; by this: p = mfree(p); Change generated using coccinelle. Semantic patch is added to the sources.

remove unused includes This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.

everywhere: make use of new0() and macro() macros, and stop using perror()

use memzero(foo, length); for all memset(foo, 0, length); calls In trying to track down a stupid linker bug, I noticed a bunch of memset() calls that should be using memzero() to make it more "obvious" that the options are correct (i.e. 0 is not the length, but the data to set). So fix up all current calls to memset(foo, 0, length) to memzero(foo, length).

udev: declare some symbols static

libudev: avoid leak during realloc failure

libudev: update copyright headers

fix a couple of issues found with llvm-analyze

udev: use container_of() macro

docs: hook-up gtk-doc to 'make check'

udev: move libudev, gudev to src/; move gudev/docs/, udev/docs/ to to docs/