Change OAI license to CSSL v1.0 (and others)

- all RAN code, CI code, configuration files, dockerfiles, in CSSL v1.0
- all deployment code (openshift, charts, ancillary files like shell
  scripts), in MIT
- documentation in CC-BY-4.0
- exceptions might apply and are listed in NOTICE
- there is a new LICENSES folder with all licenses
- CONTRIBUTIONS.md has been updated accordingly

For automated changes based on OAI PL v1.1:

    perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.{c,h,cpp}
    perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.ts
    perl -i~ -0pe 's/<!--.*Licensed to the OpenAirInterface.*openairinterface.org\n.*-->/<!-- SPDX-License-Identifier: LicenseRef-CSSL-1.0 -->/s' **/*.xml

The rest (cmake, files with missing license, cmake) manually.

tools/docker-dev-env/Dockerfile

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LicenseRef-CSSL-1.0
+
 FROM ran-base:latest
 ARG USERNAME=root
 ARG USER_UID=1000

tools/docker-dev-env/README.md

@@ -1,3 +1,5 @@
+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+
 # Containerized development environment for OAI
 
 ## Description

tools/docker-dev-env/bootstrap.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+
 set -e
 CONTAINER_NAME=openair-dev-$USER
 if [ "$EUID" -eq 0 ]; then

tools/docker-dev-env/docker-compose.yml

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: MIT
+
 services:
   openair-dev-env:
     container_name: "openair-dev-${USER}"

tools/formatting/README.md

@@ -1,3 +1,5 @@
+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+
 # Overview
 
 Dockerized tool to list clang-format errors introduced in a branch.

tools/formatting/detect_clang_format_errors.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
+
 set -eo pipefail
 
 BASE_COMMIT=$(git merge-base HEAD origin/develop)

tools/formatting/docker-compose.yaml

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: MIT
+
 services:
   clang-formatter:
     image: clang-formatter

tools/iwyu/README.md

@@ -1,3 +1,5 @@
+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+
 # Overview
 
 IWYU - [include what you use](https://github.com/include-what-you-use/include-what-you-use)

tools/iwyu/docker-compose.yaml

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: MIT
+
 services:
   iwyu:
     image: iwyu

tools/packages/packages.cmake

@@ -1,3 +1,5 @@
+# SPDX-License-Identifier: LicenseRef-CSSL-1.0
+
 set(COMPONENTS_LIST "")
 
 set(CPACK_PACKAGE_VERSION ${OAI_VERSION})
@@ -16,7 +18,7 @@ if(PACKAGING_RPM)
   set(CPACK_RPM_COMPONENT_INSTALL ON)
   set(CPACK_RPM_PACKAGE_ARCHITECTURE ${CMAKE_SYSTEM_PROCESSOR})
   set(CPACK_RPM_PACKAGE_URL "https://openairinterface.org")
-  set(CPACK_RPM_PACKAGE_LICENSE "OAI Public License v1.1")
+  set(CPACK_RPM_PACKAGE_LICENSE "Collaborative Standards Software License v1.0")
   set(CPACK_RPM_PACKAGE_GROUP "Development/Tools")
   set(SYSTEMD_UNIT_DIR "/usr/lib/systemd/system")
   set(CPACK_RPM_DEBUGINFO_PACKAGE ON)

tools/plots/README.md

@@ -1,3 +1,5 @@
+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+
 # Plotting tools
 
 ## `ul_bler_vs_snr_graph.py`

tools/plots/plot-power-control.gp.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: LicenseRef-CSSL-1.0
 
 function die() { echo "$@"; exit 1; }
 

tools/scripts/multi-ue.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+# SPDX-License-Identifier: MIT
 
 ue_id=-1