Fix for bug 9781; bugfix on cd05f35d in 0.2.4.2-alpha.

No code has changed; only moved. Part of a fix for 9781.

Since this is critical-path, let's tune the value we pass to
csiphash a little so it fits into one whole round.

Reported by cypherpunks.

Fix for #11761; bugfix on 0.2.3.13-alpha where we made ht.h stop using
_identifiers.

Fixes ticket 11750.

Apparently, there exist cross-compiling environments for arm7 where
you can compile a 64x64->128 multiply, but not link it.

Fixes bug 11729; bugfix on 0.2.4.8-alpha. Patch from 'conradev'.

This is a stopgap measure to make sure that microdescriptors never
collide; see bug 11743.

This was crashing on --verify-config in the debian startup script, if you
had sandboxing enabled.  Fixes 11609; fix on 0.2.5.1-alpha.

The /tor/dbg-stability.txt URL was meant to help debug WFU and MTBF
calculations, but nobody was using it.

Fixes #11742.

(I had a bad clone of Knuth's algorithm sitting around in an old code
repository of mine.  I added orphan detection and smarter hyphenation;
it seems to give marginally better results than we had before.)

Bugfix on aa0eb202; bugfix not on any
released Tor.

Conflicts:
	src/or/config.c

(this is an "ours" merge, to avoid taking 6a4f5d9b into 0.2.5: that
commit downgrades the bug 7164 warning in versions <= 0.2.4 because it
isn't as useful as the one 0.2.5 has)

Conflicts:
	src/or/microdesc.c

The 0.2.5.x warning is the one that might help us track this down; the
warnings in stable are just annoying users over and over and over.

We don't have any more latex files in Tor, so there's no reason to
.gitignore all of the latex droppings.  On the other hand, automake
likes to use .trs files and .log for test suite outputs.