Complete revamp of the pathexec functions

- pathexec_run is now called exec_ae
    a for provided file name (default: argv[0])
    e for provided envp (default: environ)
- pathexec is now called mexec. m for merge environment. Option letters are:
    a for provided file name (default: argv[0])
    e for provided envp (default: environ)
    f for provided envp *and* length of the envp
    m for provided modif string plus its length (the length is always needed
because the modifs are null-terminated)
    n for provided modif string, length *and* number of modifs
- functions have a foo0 version for _exit(0) when argv[0] is null
- functions have a xfoo version to die if the exec fails
- and a xfoo0
- Compatibility #defines and #includes are there until the next major bump

1 files changed, 1 insertions, 0 deletions

diff --git a/doc/upgrade.html b/doc/upgrade.html
index 56b00c6..da2185c 100644
--- a/doc/upgrade.html
+++ b/doc/upgrade.html
@@ -24,6 +24,7 @@
  <li> New <tt>ipc_bind_reuse_lock()</tt> function, which takes a lock before
 deleting a Unix domain socket. The <tt>ipc_bind_reuse()</tt> function now
 uses it, so it won't unconditionally clobber sockets in the filesystem anymore. </li>
+ <li> Complete revamping of the pathexec functions, see <tt>exec.h</tt>. </li>
 </ul>
 
 <h2> in 2.9.3.0 </h2>