kerberos_ldap_group/cert_tool: Remove ksh dependency

Shell scripts published with Squid should be POSIX neutral. Replace the
ksh-specific syntax with portable POSIX shell.
Fix typo in squidclient.1
Bug 4102: sslbump cert contains only a dot character in key usage extension

The patch for bug 3966 was slightly incorrect. As a result the Key Usage
field for SSL-bump mimic'ed certificates could end up containing only a
dot (.) character.
Fix typo in cbdata.cc
Boilerplate: add copyright blurb to misc files
Source Maintenance: Add checks for copyright blurbs

* Check for copyright blurbs in repository files.

* Allow skipping of third-party and binary files.

* Add copyright blurb to auto-generated files created by maintenance
  script.
SourceFormat Enforcement
Fix: Unable to open FTP socket during reconfigure

Squid does not close FTP listening ports on reconfigure.
Source Maintenance: bump astyle version to 2.03
Fix man(8)/man(1) page syntax

It seems automated tools such as lroff are not able to parse the groff
syntax accurately for automated indexing of our man pages.

The if-conditional syntax was only used to simplify translators lives
so we can live with the tools preferred 1-liner syntax for the NAME
section.
Prep for 3.5.0.2 and 3.4.9
3.5.0.2