package/cppcms: change upstream to Github, bump to 2.0.1

package/cppcms: change upstream to Github, bump to 2.0.1

cppcms.com now points to a Github page at
https://github.com/artyom-beilis/cppcms which has a 2.0.1 version, so
let's use that. The number of differences to 2.0.0.beta2 is very
small:

$ git log --online v2.0.0.beta2..v2.0.1
b872972 (tag: v2.0.1, origin/master, origin/HEAD, master) Version to 2.0.1
a1914f7 (tag: v2.0.0) Replaced system category with one from predating C++11 (v1.2) because std::system_category does not translate WSAGetLastError results
c4febcc Merge pull request #104 from dreaming-augustin/upstream
922cd49 Python 3.12 compatibility: wrap regex in r''.
a11e9d4 Merge branch 'cpp11'
3000bc6 (origin/1.2_updates) Merge pull request #99 from dreaming-augustin/master
44e24c7 [#89] cppcms_error fix typo + consistent  messages
a6d5575 (origin/cpp11) Added backtrace to system error
b3aef3b Fixed missing include for stripped down build
463a9a6 Removed IPV6 due to travis limitations
f8163c6 Merges from cpp11
31d4fe7 Added verbose log on failure
90bc996 Added Linux to build matrix - so I have fallback if normal build environment fails
f78ee39 Added Readme for github
a737d5d Merged python3 compatibility from master
0c67544 Support of python 2.7 and python 3
0d121a7 Python3 compatibility
2fc7e38 Python3 compatibility
d745869 python3 fix for tmp_cc

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>