readme: update urls to https (termux#2190)

README.md

@@ -92,7 +92,7 @@ The main ones are the following.
 - [Termux Reddit community](https://reddit.com/r/termux)
 - [Termux Matrix Channel](https://matrix.to/#termux_termux:gitter.im)
 - [Termux Dev Matrix Channel](https://matrix.to/#termux_dev:gitter.im)
-- [Termux Twitter](http://twitter.com/termux/)
+- [Termux Twitter](https://twitter.com/termux/)
 - [Termux Reports Email](mailto:termuxreports@groups.io)
 
 ### Wikis
@@ -117,21 +117,21 @@ The main ones are the following.
 
 ### Terminal resources
 
-- [XTerm control sequences](http://invisible-island.net/xterm/ctlseqs/ctlseqs.html)
-- [vt100.net](http://vt100.net/)
-- [Terminal codes (ANSI and terminfo equivalents)](http://wiki.bash-hackers.org/scripting/terminalcodes)
+- [XTerm control sequences](https://invisible-island.net/xterm/ctlseqs/ctlseqs.html)
+- [vt100.net](https://vt100.net/)
+- [Terminal codes (ANSI and terminfo equivalents)](https://wiki.bash-hackers.org/scripting/terminalcodes)
 
 ### Terminal emulators
 
 - VTE (libvte): Terminal emulator widget for GTK+, mainly used in gnome-terminal. [Source](https://github.com/GNOME/vte), [Open Issues](https://bugzilla.gnome.org/buglist.cgi?quicksearch=product%3A%22vte%22+), and [All (including closed) issues](https://bugzilla.gnome.org/buglist.cgi?bug_status=RESOLVED&bug_status=VERIFIED&chfield=resolution&chfieldfrom=-2000d&chfieldvalue=FIXED&product=vte&resolution=FIXED).
 
-- iTerm 2: OS X terminal application. [Source](https://github.com/gnachman/iTerm2), [Issues](https://gitlab.com/gnachman/iterm2/issues) and [Documentation](http://www.iterm2.com/documentation.html) (which includes [iTerm2 proprietary escape codes](http://www.iterm2.com/documentation-escape-codes.html)).
+- iTerm 2: OS X terminal application. [Source](https://github.com/gnachman/iTerm2), [Issues](https://gitlab.com/gnachman/iterm2/issues) and [Documentation](https://iterm2.com/documentation.html) (which includes [iTerm2 proprietary escape codes](https://iterm2.com/documentation-escape-codes.html)).
 
 - Konsole: KDE terminal application. [Source](https://projects.kde.org/projects/kde/applications/konsole/repository), in particular [tests](https://projects.kde.org/projects/kde/applications/konsole/repository/revisions/master/show/tests), [Bugs](https://bugs.kde.org/buglist.cgi?bug_severity=critical&bug_severity=grave&bug_severity=major&bug_severity=crash&bug_severity=normal&bug_severity=minor&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&product=konsole) and [Wishes](https://bugs.kde.org/buglist.cgi?bug_severity=wishlist&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&product=konsole).
 
 - hterm: JavaScript terminal implementation from Chromium. [Source](https://github.com/chromium/hterm), including [tests](https://github.com/chromium/hterm/blob/master/js/hterm_vt_tests.js), and [Google group](https://groups.google.com/a/chromium.org/forum/#!forum/chromium-hterm).
 
-- xterm: The grandfather of terminal emulators. [Source](http://invisible-island.net/datafiles/release/xterm.tar.gz).
+- xterm: The grandfather of terminal emulators. [Source](https://invisible-island.net/datafiles/release/xterm.tar.gz).
 
 - Connectbot: Android SSH client. [Source](https://github.com/connectbot/connectbot)