Proxy support for vpm

[herrfrei]

Right now installing modules behind a proxy is not supported, at least on Windows. Tested it by setting
http_proxy and https_proxy env variables without success.

Example:

v install sqlite
Error 10057 sending data to server (1)
Error performing handshake

[highfestiva]

Second this, would be nice if the *_proxy vars were used and things "just work," like in pip/python. Lowering the threshold is important for adoption. Right now I as a total v n00b get an endless call stack dump when trying to install a module:

$ v install -v watchmen123456.valval
launch_tool vexe        : C:\prog\v
launch_tool vroot       : C:\prog\v
launch_tool tool_source : C:\prog\v\cmd\tools\vpm.v
launch_tool tool_exe    : C:\prog\v\cmd\tools\vpm.exe
launch_tool tool_args   : install -v watchmen123456.valval
launch_tool should_compile: false
cli params: ['install', 'watchmen123456.valval']
Retrieving module metadata from: https://vpm.vlang.io/jsmod/watchmen123456.valval ...
Error 10054 reading data from server
Error performing handshake
Unhandled Exception 0xC0000005
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8224: at print_backtrace_skipping_top_frames_tcc: Backtrace
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8191: by print_backtrace_skipping_top_frames
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8249: by unhandled_exception_handler
7ffa52dcc896 : by ???
326a14380000 : by ???
Unhandled Exception 0xC0000005
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8224: at print_backtrace_skipping_top_frames_tcc: Backtrace
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8191: by print_backtrace_skipping_top_frames
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8249: by unhandled_exception_handler
7ffa52dcc896 : by ???
326a14380000 : by ???
Unhandled Exception 0xC0000005
C:/Users/myuser/AppData/Local/Temp/v/vpm.1074549984488971419.tmp.c:8224: at print_backtrace_skipping_top_frames_tcc: Backtrace
...

I'd be happy to fixing this, and similar issues, when I'm up to speed in a few months, because I think v looks promising. But I understand it can put a lot of n00bs off with the "no explaination, just a 90'ies wall of text" things I've bumped into so far.

[osascruz]

in windows, is there any plan to get the following to be supported ?
set http_proxy=127.0.0.1:8080
set https_proxy=127.0.0.1:8080