yang in CLICON_YANG_MAIN_DIR can't import module's in CLICON_YANG_DIR recursively

[nowaits]

Hi olof,
The feature of recursive searching did not work with CLICON_YANG_MAIN_DIR.
my config is example.xml

<clixon-config xmlns="http://clicon.org/config">
  <CLICON_FEATURE>ietf-netconf:*</CLICON_FEATURE>
  <CLICON_FEATURE>clixon-restconf:fcgi</CLICON_FEATURE>
  <CLICON_FEATURE>clixon-restconf:allow-auth-none</CLICON_FEATURE>

  <CLICON_YANG_DIR>{ROOT_DIR}/share/clixon</CLICON_YANG_DIR>
  <CLICON_YANG_DIR>{ROOT_DIR}/share/openconfig/models</CLICON_YANG_DIR>
  <CLICON_YANG_MAIN_DIR>{ROOT_DIR}/share/mgmt/modules</CLICON_YANG_MAIN_DIR>
  ...
</clixon-config>

example.yang in {ROOT_DIR}/share/mgmt/modules dir

module example {
    yang-version 1.1;
    namespace "http://www.ex.com";
    prefix ex;

    import openconfig-interfaces { prefix oc-if; }
}

When starting backend, get the following search error:

Nov 10 09:57:49: plugin_load_one retval:1
Nov 10 09:57:49: yang_parse_filename /home/dev/code/net-base/dist/script/../share/mgmt/modules/example.yang
Nov 10 09:57:49: yang_parse_module: 1034: Yang error: No yang files found matching "openconfig-interfaces" in the list of CLICON_YANG_DIRs: No such file or directory
Nov 10 09:57:49: clixon_backend: 41588 Terminated retval:-1
Nov 10 09:57:49: backend_terminate

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6f6eed0 in hist_exit () from /home/dev/code/net-base/dist/script/../lib/libcligen.so.5.4
Missing separate debuginfos, use: debuginfo-install libgcc-4.8.5-44.el7.x86_64 libstdc++-4.8.5-44.el7.x86_64
(gdb) bt
#0  0x00007ffff6f6eed0 in hist_exit () from /home/dev/code/net-base/dist/script/../lib/libcligen.so.5.4
#1  0x00007ffff6f4c6f1 in cligen_exit () from /home/dev/code/net-base/dist/script/../lib/libcligen.so.5.4
#2  0x00007ffff1848fab in backend_exit (h=0x606000000020) at /home/dev/code/net-base/mgmt/backend/main.c:296
#3  0x00007ffff7f34dbd in clixon_plugin_exit_one () from /home/dev/code/net-base/dist/script/../lib/libclixon.so.5
#4  0x00007ffff7f350cb in clixon_plugin_exit_all () from /home/dev/code/net-base/dist/script/../lib/libclixon.so.5
#5  0x00007ffff7f36cee in clixon_plugin_module_exit () from /home/dev/code/net-base/dist/script/../lib/libclixon.so.5
#6  0x000000000040781d in backend_terminate ()
#7  0x000000000040b0d3 in main ()
(gdb) 

The code commit id I tested is:

commit 52e63a14d0c324ae79d61223cf3d81d9f9f5faf0
Merge: a1fe080 02a5d97
Author: Olof Hagsand <olof@hagsand.se>
Date:   Tue Nov 9 10:07:44 2021 +0100

    Merge pull request #285 from krihal/feature_recursive_search
    
    Fix for issue #284, do recursive lookup when reading YANG files from directory

[olofhagsand]

This should be fixed now, please verify.