Unit test for smartlist_ints_eq

(This was the only wholly untested function in containers.c)
Fix tor_get_lines_from_handle() for make check-spaces
Use size_t for length in replaycache_add_test_and_elapsed()

For consistency with the rest of buffer lengths in Tor.

See #8960
forward-port the reformat of changelog stanza
forward-port 0.2.4.15-rc changelog
fixes suggested by nickm
added execve and multi-configuration support
multi-configuration support using sandbox_t struct
Don't allow all ORPort values to be NoAdvertise

Fix for bug #9366
test_pt_configure_proxy(): verify the internals of the managed proxy.
Also test that server transports get written to Tor's state.
Update coverage instructions
Use SOCKET_OK/TOR_INVALID_SOCKET in socketpair replacement code
orport progress (not functional), nickm suggested fixes
updated filters to work with orport
fixed memory leak, added array filter support
Fix an uninitialized-read when parsing v3 introduction requests.

Fortunately, later checks mean that uninitialized data can't get sent
to the network by this bug.  Unfortunately, reading uninitialized heap
*can* (in some cases, with some allocators) cause a crash if you get
unlucky and go off the end of a page.

Found by asn.  Bugfix on 0.2.4.1-alpha.
Merge branch 'maint-0.2.4'
forward-port the 0.2.4.16-rc changelog
new location for tarballs; and you should edit Makefile too