doc: txt2pre: more manpage URLs

We host our own -imapd manpage, and we started using a few more
git commands (fast-import for ages).  We'll also need to link to
manpages.debian.org and live with long URLs for a few
non-standard manpages in software we reference.

(cherry picked from commit 31065006a3654968c0c4bbfe2d7399a3b326ce18)

diff --git a/Documentation/txt2pre b/Documentation/txt2pre
index e9b5eb7db10ddf3a3ad0322454fba6fd3a898402..75d2d12b427b06f896e78590c89da2f02530370e 100755 (executable)
--- a/Documentation/txt2pre
+++ b/Documentation/txt2pre
@@ -17,6 +17,7 @@ for (qw[public-inbox.cgi(1)
        public-inbox-daemon(8)
        public-inbox-edit(1)
        public-inbox-httpd(1)
+       public-inbox-imapd(1)
        public-inbox-index(1)
        public-inbox-init(1)
        public-inbox-learn(1)
@@ -48,7 +49,9 @@ for (qw[git(1)
        git-am(1)
        git-apply(1)
        git-config(1)
+       git-credential(1)
        git-daemon(1)
+       git-fast-import(1)
        git-fetch(1)
        git-filter-branch(1)
        git-format-patch(1)
@@ -73,6 +76,11 @@ for (qw[
        $xurls{$_} = "https://www.freedesktop.org/software/systemd/man/$n.html";
 }
 
+$xurls{'netrc(5)'} = 'https://manpages.debian.org/stable/ftp/netrc.5.en.html';
+$xurls{'mbsync(1)'} =
+       'https://manpages.debian.org/stable/isync/mbsync.1.en.html';
+$xurls{'offlineimap(1)'} =
+       'https://manpages.debian.org/stable/offlineimap/offlineimap.1.en.html';
 $xurls{'spamc(1)'} =
        'https://spamassassin.apache.org/full/3.4.x/doc/spamc.html';
 $xurls{'grok-pull'} =