Add documentation for Solaris environ size fix when using daemon mode.

docs/release-notes/version-4.5.24.rst

@@ -5,3 +5,16 @@ Version 4.5.24
 Version 4.5.24 of mod_wsgi can be obtained from:
 
   https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.24
+
+Bugs Fixed
+----------
+
+* Using mod_wsgi in daemon mode on Solaris would cause a process hang or
+  max out CPU usage. Caused by change of variable type to unsigned to get
+  rid of compiler warnings, without fixing how condition check using
+  variable was done.
+
+  Problem could also affect non Solaris systems if total number of HTTP
+  headers and other variables passed in WSGI environ was greater than 1024.
+  Affected Solaris all the time due to it having a limit of only 16 in
+  operating system for same code, meaning hit problem immediately.

src/server/mod_wsgi.c

@@ -10717,6 +10717,7 @@ static apr_status_t wsgi_socket_sendv(apr_socket_t *sock, struct iovec *vec,
 
             if (rv != APR_SUCCESS)
                 return rv;
+
             if (nvec > iov_max) {
                 nvec -= iov_max;
                 offset += iov_max;