New features and changes since tin-2.6.0

New features
------------
- pcre2 support (configure --with-pcre2-config[=PATH] vs.
  --with-pcre[=PATH])
- NNTPS support based on libressl/gnuttls/OpenSSL (RFC 8143)
  (configure --with-nntps[=[libtls|openssl|gnutls]])
- allow to cancel wait_message() via key press
- option to hide help/mail-info in title: show_help_mail_sign
- option remove SOFT HYPHENs (U+00AD) from non verbatim blocks:
  suppress_soft_hyphens
- ConnectionInfo page ('J')
- ${TIN_HOMEDIR:-"$HOME"}/.tin/$NNTPSERVER${NNTPPORT:+":$NNTPPORT"}/msglog

Changes
-------
switch from stdio to own buffer implementation

Retired Features
----------------
