[#70][#62] Remove VistA Code; Allow CTRL-C

VistA Removal (and other small things):

%webapi:

• Use SRCDIR^%RSEL instead ofRTNDIR^%ZOSV
• Rename ERR -> err
• Rename POSTTEST -> posttest, update comments
• Remove FV, LISTER, F, RPC, rpc2 (all VistA code)
• Fix Cacheism missed in last commit in FILESYSE

%webreq:

• Fix Cacheism missing in last commit in job (which is slated for removal anyways)
• Enable CTRL-C
• Remove VistA logout
• Replace $$HTE^%webutils with $ZDATE
• Remove VistA error trap

%webrsp:

• Remove the parameters processing (not supported anymore, as that depends on the VistA file)
• Remove matching against the VistA file 17.6001 for URLs
• Remove Authentication against VistA
• Remove RGNET shim

%webtest:

• Remove ac/vc,dfn for VistA login
• Fix tgetr text, as the text has changed in the routine and what we validate is no longer there.
• Enable tputr outside of VistA, as the code in %webapi now can handle it.
• Remove trpc[1-4], tParams
• Redo tLog3 to work without VistA
• Remove tINIT (requires Fileman)
• Remove resetURLs and anything that relied on it.

%weburl:

• Move all 17.6001 entries to this file (but no authentication is supported right now)

%webutils:

• Remove all VistA derived date functions
• Remove addService, deleteService which added/deleted entries in 17.6001.

Other minor changes:

• Dockerfile script in ci/run_test.sh edited to allow passing parameters. Documentation in doc/dockerfile-notes.md updated; .gitlab-ci.yml now adjusted for new way of doing this.
• Dockerfile reorganized so that COPY ./src /mwebserver/r line is the almost the last, as mostly, that's the only code that changes between different runs. This allows for fast regeneration of the Dockerfile.
• Small README.md change per an earlier review that we wanted to merge without needing to rebase later code.