uncommit: add options to update to the current user or current date
These are also from the evolve extension's version of uncommit.
I tried adding validation that both forms of user or date can't be specified at
the same time, but that fails because these show up in `opts` with a None value
whether or not the option was given on the command line. Presumably that means
the conditional in `resolvecommitoptions` could be simplified. But this is how
both evolve and MQ handle it.
Differential Revision: https://phab.mercurial-scm.org/D6828
extern crate cc;
fn main() {
cc::Build::new()
.warnings(true)
.file("src/sendfds.c")
.file("src/sighandlers.c")
.compile("procutil");
}