gcf2: wire up read-only daemons and rm -gcf2 script

It seems easiest to have a singleton Gcf2Client client object
per daemon worker for all inboxes to use.  This reduces overall
FD usage from pipes.

The `public-inbox-gcf2' command + manpage are gone and a `$^X'
one-liner is used, instead.  This saves inodes for internal
commands and hopefully makes it easier to avoid mismatched
PERL5LIB include paths (as noticed during development :x).

We'll also make the existing cat-file process management
infrastructure more resilient to BOFHs on process killing
sprees (or in case our libgit2-based code fails on us).

(Rare) PublicInbox::WWW PSGI users NOT using public-inbox-httpd
won't automatically benefit from this change, and extra
configuration will be required (to be documented later).

1 files changed, 1 insertions, 0 deletions

diff --git a/script/public-inbox-httpd b/script/public-inbox-httpd
index b8159f3a..3befdab8 100755
--- a/script/public-inbox-httpd
+++ b/script/public-inbox-httpd
@@ -13,6 +13,7 @@ BEGIN {
         require PublicInbox::HTTP;
         require PublicInbox::HTTPD;
 }
+
 my %httpds;
 my $app;
 my $refresh = sub {